• General Overview
  • The Central Thesis
    • Economics as a way of seeing: morality is how we wish the world worked; economics is how it does
    • No unifying theme: the book's only method is asking good questions and following the data
    • Hidden side of everything: incentives, information gaps, and distant causes explain what conventional wisdom misses
    • Rogue economist: Levitt turns his curiosity on everyday riddles, not markets, taxes, or math
    • Four working principles: incentives matter, conventional wisdom is often wrong, causes are remote, experts serve themselves
  • Incentives and Their Dark Side
    • Incentives rule: economic, social, and moral levers drive behavior, and schemes routinely backfire
    • Haifa day-care fine: a $3 penalty doubled late pickups by buying off parental guilt
    • Cheating: the primordial economic act — more for less — thrives wherever payoff exceeds risk
    • Teacher cheating: high-stakes testing rewarded doctored answer sheets; algorithms and retests caught it
    • Sumo rigging: 7–7 wrestlers beat 8–6 opponents about 80% of the time, then win only 40% of rematches
    • Bagel man: Feldman's honor-system ledger measured white-collar honesty to the penny — about 87%
  • Information Asymmetry and Its Exploiters
    • Asymmetric information: experts know more than their clients and profit from the gap
    • Klan vs. real-estate agents: both trade on secret knowledge; exposure destroyed the Klan's mystique
    • Stetson Kennedy: leaked Klan rituals to radio and press, turning "Mr. Ayak" into a national joke
    • Real-estate agents: commission math pushes them toward a fast sale, not your highest price
    • Coded listings: "granite" and "maple" signal value; "charming" and "spacious" flag hidden defects
    • The Internet: compresses information gaps, saving term-life insurance buyers $1 billion a year
  • The Great Crime Drop
    • Unexpected collapse: every crime category fell every year through the 1990s, defying every expert forecast
    • Conventional explanations: the economy, gun control, and policing strategy each explain far less than claimed
    • Roe v. Wade: legalized abortion meant fewer unwanted children born into crime-prone circumstances
    • Ceaușescu's ban: Romania's abortion ban produced a damaged cohort — America's story in reverse
    • Prisons and police: imprisonment accounts for roughly a third of the drop; more cops about 10%
    • Crack's collapse: falling profits cooled turf wars, explaining roughly 15% of the decline
  • Causation, Measurement, and Conventional Wisdom
    • Correlation ≠ causation: X may cause Y, Y may cause X, or a hidden Z may drive both
    • Campaign spending: halving or doubling a campaign's cash moves its vote share about 1 percent
    • Natural experiments: comparing identical candidates across races unlinks money from winning
    • Conventional wisdom: simple, convenient, comfortable — and, as Galbraith said, rarely true
    • Mitch Snyder: invented three million homeless to satisfy reporters' appetite for the jarring
    • Listerine: ads invented a halitosis crisis and lifted revenue from $115,000 to $8 million
  • Crime as Business
    • Gang as firm: the Black Disciples mimic McDonald's — board, officers, foot soldiers, and ledgers
    • Sudhir Venkatesh: embedded six years and retrieved the first real financial records of a crack gang
    • Street economics: monthly sales of $32,000; foot soldiers earn $3.30 an hour, most holding legal jobs too
    • Tournament logic: low pay persists because workers gamble on a sliver of a $500,000 top prize
    • Incentive clash: soldiers start wars to prove themselves while bosses, needing peace, prefer quiet
    • Crack: democratized cocaine and quadrupled young black homicide — until the profit bubble burst
  • Parenting, Names, and What Matters
    • Who parents are vs. what they do: background predicts outcomes; technique barely does
    • Eight that matter: educated parents, high SES, older mother, PTA, books, English, adoption, birthweight
    • Eight that don't: intact family, better neighborhood, stay-at-home mother, Head Start, museums, spanking
    • Indicators not causes: books in the home signal educated parents rather than producing success
    • Audit studies: white names draw more callbacks, but the résumé signals background, not racism alone
    • Names as signals: distinctively black names mark circumstance and disadvantage, never destiny
  • How to Think Like a Rogue Economist
    • Right questions over right tools: economics has excellent tools and far too few interesting questions
    • Data mining: balance intelligence with intuition; seek the data trove no one has bothered to use
    • Treasure hunt: reverse-engineer what a gang member or sumo wrestler already knew
    • Empathic inference: ask "What would I do?" — abortion as insurance, agents as swindlers
    • Uncomfortable truths: follow evidence into morally explosive territory, then let readers judge
    • Trying anyway: parents signal expectations through names even knowing names change little
• Deep Dive
  • Front Matter
    • The Premise
      • Freakonomics: a "rogue" economics that strays from the discipline's usual turf
      • "The hidden side of everything": the subtitle frames the book's central ambition
      • Rogue economist: turns economic tools on subjects conventional economics ignores
    • The Authors
      • Steven D. Levitt: the economist behind the book's offbeat questions
      • Stephen J. Dubner: the writer who shapes the analysis into narrative
    • What the Edition Offers
      • Introduction: "The Hidden Side of Everything" sets the guiding idea
      • Seven chapters: each titled as a deceptively simple, provocative question
      • Epilogue: "Two Paths to Harvard" closes the argument
      • Revised and expanded edition (2006): adds a bonus-material section
  • An Explanatory Note
    • An Unorthodox Economist
      • Levitt: heralded University of Chicago economist, John Bates Clark Medal winner, but no interest in classic monetary affairs.
      • Self-effacing: "I just don't know very much about the field of economics" — no math, econometrics, or theory.
      • Curiosity: drawn to riddles of everyday life, not stock markets, taxes, or deflation.
      • Economics redefined: distills the dismal science to explaining how people get what they want.
    • Riddles That Define His Work
      • Signature questions: drug dealers living with mothers; guns vs. swimming pools; causes of falling crime.
      • Hidden sides: real-estate agents' loyalties, black parents' name choices, teacher cheating, sumo corruption.
      • Intuitionist: sifts data to find unseen stories and measures effects others deemed unmeasurable.
      • Core obsessions: cheating, corruption, and crime.
    • Response to His Ideas
      • Fame: thousands of readers and organizations — GM, the Yankees, senators, prisoners, parents — sought his insight.
      • Unusual callers: a Tour de France champion asked about doping; the CIA asked about catching terrorists.
      • Worldview: the modern world, despite deceit and complication, is not unknowable — a new perspective reveals more intrigue.
    • Book's Genesis
      • Reluctant author: Levitt refused to write a book alone, preferring to solve endless riddles.
      • Partnership: he proposed collaborating with Dubner, becoming "the two of us."
      • Invitation: the book is an experiment both hope readers find worthwhile.
  • Introduction
    • Introduction · I
      • The Crime Drop That Experts Missed
        • Crime panic: violent crime rose relentlessly; doomsayers predicted 1995 would look like the good old days.
        • Superpredator warning: criminologists and President Clinton forecast a coming wave of ruthless teen killers.
        • Unexpected reversal: every category of crime fell in every region, year after year.
        • Stunning magnitude: teen murder rate fell over 50% in five years; overall murder rate hit a 35-year low.
        • Conventional wisdom: experts credited the economy, gun control, and smarter policing—none were true.
      • Roe v. Wade and the Abortion-Crime Link
        • Norma McCorvey: poor, uneducated, alcoholic 21-year-old; her case became Roe v. Wade.
        • Legalized abortion: the 1973 Supreme Court ruling made abortion legal nationwide—too late for McCorvey.
        • Adversity predicts crime: children born into adverse families are far more likely to become criminals.
        • Abortion's impact: the women most likely to abort were poor, unmarried, teenage mothers—models of adversity.
        • Crime-drop trigger: their unborn children would have entered criminal prime years later; crime plummeted instead.
      • Experts: Information and Incentives
        • The expert problem: specialized experts hold an informational advantage their clients cannot easily verify.
        • Incentives rule: how an expert treats you depends on how his incentives are arranged.
        • Mechanic leniency: California mechanics passed failing emissions tests to earn repeat business.
        • C-section trend: obstetricians in shrinking birth markets perform more cesareans to sustain revenue.
      • The Real-Estate Test
        • Public-record experiment: Chicago data on nearly 100,000 home sales, 3,000 owned by agents.
        • Commission arithmetic: an agent's personal take is only 1.5% of price; an extra $10,000 earns her just $150.
        • Conflict revealed: agents keep their own homes on the market 10 days longer and sell for 3+% more.
        • Hidden side: when selling yours, agents push the first decent offer; when selling their own, they wait.
    • Introduction · II
      • The Fallacy of Conventional Wisdom
        • Money buys elections: a truism, but correlation does not prove causation.
        • Correlation ≠ causation: X may cause Y, Y may cause X, or some Z causes both.
        • Police/murder puzzle: Washington has more police and murders than Denver; data alone can't say why.
        • Czar folktale: killing all doctors to cure disease—same wayward reasoning.
        • Big spenders can lose: Forbes, Huffington, and Golisano spent millions and lost badly.
      • What Data Reveals About Campaign Spending
        • Incentives shape donors: contributors give to winners and incumbents, not sure losers.
        • Appeal drives money: appealing candidates raise more and win; money may not cause it.
        • Natural experiment: same two candidates in consecutive races measures money's true impact.
        • Spending barely matters: halving spending loses 1 percent; doubling spending gains 1 percent.
        • Who you are wins: candidate appeal outweighs campaign cash.
      • Economics as a Way of Seeing
        • Morality vs economics: morality is how we want the world; economics is how it actually works.
        • Science of measurement: economic tools can assess any thicket, from jobs to crime.
        • Data as a contrail: incidental patterns left behind reveal hidden causes.
        • No unifying theme: Freakonomics uses a treasure-hunt approach with economic tools.
        • Adam Smith's legacy: philosopher-economist studied friction between individual desire and societal norms.
      • Four Core Principles
        • Incentives matter: cornerstone of modern life; understanding them solves riddles.
        • Conventional wisdom is often wrong: crime, money, and eight-glasses-water myths.
        • Distant, subtle causes: McCorvey and Blandon shaped crime more than police or economy.
        • Experts serve themselves: informational advantage shrinks with the Internet.
        • Measure correctly: knowing what and how to measure simplifies a complex world.
  • Epilogue
    • Epilogue · I
      • Incentives: The Core of Economics
        • Economics: at root the study of incentives, and incentives are levers with astonishing power
        • Three flavors: economic, social, and moral; effective schemes often combine all three
        • Anti-smoking campaign: sin tax, public bans, and terrorism links blend all three incentives
        • Crime deterrence: jail, shame, and conscience combine; cities post pictures of convicted johns
        • Homicide decline: European murder rates fell sharply over centuries—incentives against killing work
      • The Day-Care Fine
        • Haifa day-care study: ten centers; $3 fine for parents arriving more than 10 minutes late
        • Backfired: late pickups doubled—$3 was cheap enough to buy off guilt
        • Signal: small fine told parents lateness was not serious; guilt disappeared
        • Persistence: after fine removal, late arrivals stayed high—the moral incentive was gone
        • Trade-off: incentives balance extremes; a $100 fine would work but breed ill will
      • When Money Crowds Out Morality
        • Blood donations: small stipend reduced giving by turning charity into inadequate pay
        • Dark side: huge rewards invite fraud—stolen blood, fake IDs, circumventing limits
        • Jefferson: a two-penny tea duty can unsettle an empire—causes have inscrutable consequences
        • Cheating: primordial economic act—getting more for less—and every incentive scheme draws people who try to beat it
      • Teacher Cheating Under High-Stakes Testing
        • Chicago Public Schools: 1996 high-stakes testing tied promotion and probation to scores
        • Teacher incentives: low scores can mean censure or firing; high gains earn bonuses; cheating is rarely punished
        • Methods: extra time, early test copies, teaching to the test, erasing and correcting answers
        • Detection algorithm: flags unusual identical answer blocks, especially on hard questions
        • Score spike tell: a big gain followed by a drop signals artificially inflated scores
        • Classroom A: reordered answer strings reveal identical correct patterns on tricky items
    • Epilogue · II
      • Teacher Cheating in Chicago Schools
        • Suspicious answer strings: 15 students got identical six correct answers; blank runs were broken by the teacher
        • Wrong answers as cover: teachers may include incorrect answers strategically—or simply not know the right ones
        • Score evidence: class averaged 1.7 grade levels of gain, then collapsed in seventh grade; likely pencil work
        • Cruel twist: low-performing students are promoted on inflated scores, then fail without the cheating teacher
        • Cheater profile: younger, less qualified, in low-scoring classrooms; cheating spiked after high-stakes testing began
        • Good teachers identified too: real learning shows on easier missed questions and carries into the next grade
      • Duncan's Retest Experiment
        • Arne Duncan: reform-minded Chicago CEO, loyal to children and families rather than the teachers' union
        • Retesting strategy: 120 classrooms blending suspected cheaters, excellent teachers, and controls; scores wouldn't count
        • Compelling results: suspected cheat classrooms fell more than a grade level; control classrooms held or rose
        • Outcome: a dozen teachers fired, cheating fell more than 30 percent the next year
      • Cheating Beyond Schools
        • University of Georgia: basketball coach's son taught a joke exam; every student got an A; both coaches were fired
        • Cheating to lose is unforgivable: Black Sox, CCNY point-shavers, and Brando's Terry Malloy all carry lasting shame
        • Sumo's incentive scheme: rank controls money, food, sleep, and status; the eighth victory is critical
        • Universal corruption question: answer may lie in Paul Feldman's bagel business
      • Sumo Rigging Evidence
        • Bubble wrestlers overperform: 7–7 wrestlers beat 8–6 opponents on final day about 80% of the time, despite expected ~50%
        • Quid pro quo pattern: bubble winners win only 40% of rematches, then results revert to normal
        • Organized collusion: stable-level patterns and Olympic-style vote swapping suggest high-level rigging
        • Scrutiny works: after media allegations, bubble win rate drops to 50%; whistle-blowers named 29 corrupt wrestlers
        • Corruption network: corrupt-corrupt bubbles win 80%; unnamed opponents also show skewed results
    • Epilogue · III
      • How Is the Ku Klux Klan Like a Group of Real-Estate Agents?
        • Klan History
          • Origins: six Confederate soldiers in Pulaski, Tennessee, named their circle from Greek kuklos.
          • First era: midnight pranks became terrorist campaign; federal retreat later delivered Jim Crow.
          • Grant's indictment: Klan sought political terror, disarmament, and re-enslavement by force in 1872.
          • Rebirth: D. W. Griffith's The Birth of a Nation and Woodrow Wilson's praise revived it in 1915.
          • 1920s peak: eight million members nationwide, targeting blacks, Catholics, Jews, immigrants, unionists.
          • Nazi parallel: Will Rogers said in 1933 that Hitler was copying the Klan, not Mussolini.
        • Stetson Kennedy
          • Background: Klansman lineage but became civil-rights "dissident at large" and writer.
          • Mission: infiltrate Klan to expose its leaders, rituals, passwords, and plans.
          • Method: memoir The Klan Unmasked merged Kennedy's account with infiltrator John Brown's deeds.
          • Klan code: "Mr. Ayak" = Are You a Klansman?; "Akai" = A Klansman Am I.
          • Klan language: appended "Kl" to words; secret handshake was a limp fish wiggle.
          • Flog squad: John Brown was invited into the Klavaliers, the Klan's secret police — but threatened violence often stayed threat.
        • Lynching Data
          • Tuskegee statistics: total lynchings of blacks fell dramatically decade by decade.
          • Klan paradox: more lynchings occurred in 1900–1909, when Klan was dormant, than in 1920s peak.
          • Rarity: lynchings were exceedingly rare relative to the black population, not everyday events.
          • Infant mortality comparison: 20,000 black infants died yearly in 1920 vs. 28 lynchings per year.
          • Incentive success: early lynchings worked — fear of random violence enforced docility.
        • Lessons
          • Power of incentives: few are stronger than fear of random violence; terrorism thrives on it.
          • Public fear: Klan power rested on open collusion with law enforcement and mostly threatened, not actual, violence.
          • 1940s Klan: a sorry fraternity of poorly educated men needing a vent and an excuse to stay out all night.
    • Epilogue · IV
      • The Klan's Power Was Secrecy
        • Klan rackets: dues, protection money, rallies, and insurance scams enriched leaders.
        • Kennedy's failed attacks: legal and political efforts bounced off an entrenched institution.
        • Inside leak: Stetson Kennedy fed Klan secrets to Washington Merry-Go-Round and Adventures of Superman.
        • Public mockery: secret titles and rituals like "Mr. Ayak" and "Kloran" became national jokes.
        • Membership drop: exposure halted growth and turned the Klan's secrecy against it.
        • Sunlight rule: Brandeis — "Sunlight is said to be the best of disinfectants."
      • The Internet Compresses Information Gaps
        • Information asymmetry: experts know more than consumers; the Internet shrinks the gap.
        • Term life insurance: instant price comparisons saved customers $1 billion a year.
        • Horseshoe magnet effect: the Internet lifts scattered facts out of obscurity.
        • Transparent markets: customers can check dealer costs and casket prices online.
        • Ongoing limits: Enron and mutual-fund scandals show experts still hide truth.
      • Experts Convert Information into Fear
        • Information crimes: Enron, analyst hype, and insider trading all were sins of information.
        • Enron tapes: private conversations exposed gleeful price gouging in California.
        • Fear as leverage: doctors, funeral directors, and dealers exploit ignorance and anxiety.
        • Angioplasty incentives: referral pressure can tempt doctors to recommend procedures.
      • Real-Estate Agents Exploit Their Edge
        • Self-dealing: agents keep their own homes on the market 10 extra days and sell for 3% more.
        • Incentive mismatch: an extra $10,000 on your sale earns the agent only $150 — so she pushes you to accept.
        • Coded advertising: "well maintained" signals a fixer-upper to buyers but flatters sellers.
        • Word correlations: "granite," "maple," and "gourmet" track higher prices; "charming," "spacious," and "fantastic" lower.
        • Agent leaks: one seller's agent revealed a low acceptable price, costing her client $20,000 and gaining little.
    • Epilogue · V
      • Real-Estate Agents and Information Asymmetry
        • Higher-price terms: granite, Corian, maple, gourmet, and state-of-the-art describe specific, useful physical features.
        • Lower-price terms: fantastic, charming, spacious, great neighborhood, and exclamation points signal vague defects.
        • Agent’s own ads: emphasize “new,” “granite,” “maple,” and “move-in condition”; avoid “wonderful,” “immaculate,” and “!”
        • Internet erodes edge: agents still outprice clients, but online data shrank the gap by one-third.
      • Information, Discrimination, and Public Performance
        • Universal shading: people edit information in interviews, dates, and TV appearances, not only in commerce.
        • The Weakest Link: game-show votes offer a controlled public lab for detecting discrimination.
        • Weakest Link findings: blacks and women are eliminated proportionally; elderly and Latinos face discrimination.
        • Taste-based vs information-based: elderly suffer dislike-driven bias; Latinos suffer skill-misperception bias.
        • Public bigotry costly: Trent Lott lost Senate leadership after praising a segregation-era campaign.
      • Online Dating and Self-Reports
        • Inflated profiles: users claim more income, height, looks, and blondness; women understate weight by twenty pounds.
        • Honest married men: 7% admit marriage, but few “happily married” posters risk a photo.
        • Photo matters most: no-photo men get 60% response, women 24%; photo beats income and looks.
        • Stereotypical preferences: men prize looks; women prize income; overweight hurts women, height hurts men.
        • Race action vs word: whites say race doesn’t matter, then e-mail almost exclusively white prospects.
      • Conventional Wisdom and Asking Questions
        • Good questions: overturn conventional wisdom; mere novelty does not make a question worth asking.
        • Galbraith: conventional wisdom is simple, convenient, comfortable, and rarely true.
        • Homeless myth: Mitch Snyder’s wild homeless and death numbers shaped public belief despite absurdity.
        • Voters lie to pollsters: Dinkins’s 15-point lead collapsed; David Duke polled 20% lower than actual vote.
        • David Duke: sold his Klan mailing list, then mined supporters for donations to fund gambling.
    • Epilogue · VI
      • The Making of Conventional Wisdom
        • Experts and journalists: mutually dependent; experts can deceive, but not alone.
        • Snyder's fabrication: invented 3 million homeless to satisfy reporters; jarring beats accuracy.
        • Listerine's halitosis: ads invented a social catastrophe; revenues rose from $115K to $8M.
        • Advocates' exaggeration: "one in three rape" claim trades truth for outrage and funding; actual is one in eight.
        • Krugman on Bush: anecdotes fit the approved storyline; opposite spin also finds material.
      • Police and Politicians' Incentives
        • Atlanta's crime reports: thousands downgraded to land Olympics; violent crime still high.
        • Crack dealer myth: police emphasized illicit cash for resources; media echoed millionaire image.
        • The puzzle: if dealing is so profitable, why live with mothers? Need right data and person.
      • Venkatesh's Street-Level Research
        • Wrong survey: "How do you feel being black and poor?" Five choices; real sixth: "Fuck you."
        • J.T.'s protection: gang leader granted access; Venkatesh embedded six years.
        • Booty's ledgers: four years of financial records; first such data for an economist.
        • Harvard Society of Fellows: Levitt and Venkatesh meet; odd pairing spawns crime paper.
      • A Crack Gang as a Business
        • McDonald's org chart: Black Disciples mimic corporate structure—board, officers, foot soldiers.
        • Revenue and costs: monthly sales $32K; expenses include wages, weapons, bribes, death benefits.
        • Leader's pay: J.T. earns $8,500/month ($100K/year tax-free); board bosses earn $500K.
        • Foot soldiers' wages: $3.30/hour, below minimum wage; most also hold legitimate jobs.
        • The real answer: only top 2.2% take home half money; gang wages skew like corporate America.
    • Epilogue · VII
      • Crack Dealing Is a Tournament
        • Deadly work: foot soldiers face 5.9 arrests, 2.4 wounds, and a 1-in-4 death risk over four years.
        • Worse than death row: crack dealing in Chicago projects kills more often than sitting on Texas death row.
        • Pay paradox: $3.30 hourly wage persists because willing sellers vastly outnumber street corners.
        • Wage rules: supply, skills, unpleasantness, and demand determine pay; prostitutes out-earn architects.
        • Tournament logic: workers take low-level jobs for a shot at huge top prizes, like actors or athletes.
        • Incentive clash: foot soldiers start wars to prove themselves; bosses want peace because violence ruins business.
      • Crack: The Mass-Market Innovation
        • Class drug democratized: crack made expensive cocaine cheap and smokeable, like nylon stockings made silk affordable.
        • Blandon's link: Oscar Danilo Blandon connected Colombian cartels to LA gangs, fueling the crack boom.
        • CIA claim: Blandon said profits aided Contras and CIA protected him; the book calls it unverified.
        • Gangs as firms: crack turned street gangs into commercial enterprises with real employment and territory.
        • Community damage: crack halted decades of black progress, reversing income, infant-mortality, test-score, and imprisonment gains.
        • Violent surge: homicide rates among young urban blacks quadrupled within five years.
      • Unintended Ripples
        • Failed prophecy: criminologists predicted a youth violence “bloodbath,” but crime fell unexpectedly and dramatically.
        • Hidden ripple: a powerful countervailing force arrived before the boom, but almost nobody recognized it.
        • Romanian caution: Ceaușescu banned abortion in 1966 to boost population, allowing only party women or mothers of four.
        • Abortion as variable: state abortion policy can reshape population and crime in ways leaders never intend.
    • Epilogue · VIII
      • Ceaușescu's Abortion Ban
        • Menstrual Police: agents enforced pregnancy tests and a steep "celibacy tax" on women.
        • Incentive works: contraception and sex education banned; birth rate doubled within a year.
        • Damaged cohort: post-ban children did worse in school, work, and criminality.
        • Youth revolt: teenagers born under the ban helped bring down Ceaușescu.
        • Reverse image: Romania's abortion story mirrors America's crime story.
      • The Crime Drop and Expert Failure
        • Failed forecasters: experts predicted a bloodbath; Fox called his warning intentional alarmism.
        • Theory ranking: seven newspaper explanations for the crash; the greatest cause got zero mentions.
        • Strong economy: unemployment affects property crime only; no homicide link; 1960s disprove it.
        • Execution rarity: 478 executions in the 1990s; death row is safer than street life.
        • Ehrlich math: even optimistic estimates explain under 4% of the homicide drop.
      • What Actually Worked: Prisons and Police
        • Lenient justice: 1960s conviction rates and sentences fell, sharpening criminal incentives.
        • Prison boom: drug commitments rose fifteenfold; prison population quadrupled by 2000.
        • Imprisonment effect: deters and incapacitates; accounts for roughly a third of the drop.
        • Correlation trap: "Moratorium" scholars confused high crime with high imprisonment rates.
        • Police hiring: force grew 14%; election-driven hires prove cops cut crime — about 10% of the drop.
      • The Policing-Strategy Myth
        • Broken windows: Bratton's NYPD policed turnstile jumpers, panhandlers, and squeegee men.
        • CompStat: computer-mapped hot spots and accountability replaced calcified practice.
        • Timing flaw: NYC crime fell nearly 20% before Giuliani and Bratton took office.
        • NYPD growth: 45% hiring surge predicts 18% crime reduction, erasing New York's lead.
        • LA comparison: worse-policed cities matched New York once police growth was counted.
    • Epilogue · IX
      • Guns Don't Cause Crime
        • Gun as disrupter: a gun scrambles power in any dispute; outcomes depend on whose hand holds it.
        • Gun availability: U.S. has more guns than adults; nearly two-thirds of homicides involve firearms.
        • Swiss counterexample: universal militia rifles coexist with low violence, so guns alone do not cause crime.
        • Brady Act failure: regulating legal gun sales is futile when a black market supplies criminals.
        • Buyback futility: surrendered guns are junk; expected homicide reduction is under one-tenth per buyback.
        • Lott's thesis: More Guns, Less Crime is intriguing, but replications show right-to-carry laws do not cut crime.
      • The Crack Bubble Bursts
        • Crack's violent market: huge profits made dealers kill rivals over corners and turf.
        • Profits collapsed: as cocaine prices fell, dealers underpriced each other and the bubble burst.
        • Violence abated: younger dealers judged smaller profits not worth jail or death risk.
        • Measured impact: crack crash explains about 15% of the 1990s crime drop.
        • Crack persists: smoking remains popular; cocaine arrests still near 5% of U.S. arrests.
      • Aging Population Theory Fails
        • Superpredator panic: criminologists misread demography; elders, not teens, drove population growth.
        • Elderly rarely offend: average 65-year-old is one-fiftieth as likely arrested as average teenager.
        • Too slow to matter: demographic graying cannot explain the sudden 1990s crime decline.
      • Legalized Abortion Reduced Crime
        • Ceauşescu evidence: abortion bans produce unwanted children more likely to become criminals.
        • Pre-Roe inequality: poor women lacked safe access; legalization let them avoid unwanted births.
        • Unwantedness predicts crime: poverty, single-parent homes, teenage mothers, and low maternal education drive criminality.
        • Post-Roe cohort: children born after Roe v. Wade hit their criminal prime just as crime fell.
        • State evidence: early-legalizing and high-abortion states led the decline; Australia, Canada concur.
        • Unintended benefit: legalized abortion became a great crime-lowering force, however unsettling.
    • Epilogue · X
      • The Abortion-Crime Trade-off
        • Economic pricing: any transaction, even abortion versus crime, can be assigned a number.
        • Pro-life arithmetic: if a fetus equals a newborn, every abortion is a life lost.
        • Pro-choice absolute: no number of fetuses can equal a newborn, so abortion trumps any trade-off.
        • Middle-value test: at 1 newborn = 100 fetuses, 1.5 million abortions equal 15,000 lost lives.
        • Inefficient trade: that figure exceeds the homicides that legalized abortion prevents.
        • Choice as judgment: legal abortion lets women accurately decide if they can raise the baby well.
      • Fear, Experts, and Risk
        • Expert contradiction: parenting advice on breastfeeding, sleep position, and spanking keeps reversing.
        • Fear persuades: experts gain attention by exploiting emotion, especially parental fear.
        • Pool vs. gun: a child’s drowning odds are 1 in 11,000 pools; gun death odds are 1 in over a million guns.
        • Risk equation: hazard + outrage; people underreact to high-hazard low-outrage threats and overreact to the reverse.
        • Control and dread: these distort perception; per-hour, driving and flying are about equally deadly.
        • Small fixes matter: pool precautions save about 400 young lives yearly, more than car seats or flame-retardant pajamas.
      • How Much Do Parents Matter?
        • Genes matter: about half of a child’s personality and abilities appears heritable.
        • Adoption findings: Colorado Adoption Project saw virtually no correlation with adopted parents’ traits.
        • Peers over parents: The Nurture Assumption argues peer pressure outweighs parental influence.
        • Parental counterpoint: parents still choose neighborhoods, schools, and friends, shaping peer groups.
        • Bad parenting undeniable: neglected and unwanted children show worse outcomes.
        • Data over doctrine: authors are not parenting experts; they trust evidence over expert theory.
    • Epilogue · XI
      • School Choice: A Natural Experiment
        • Chicago Public Schools lottery: a rare natural experiment on whether better schools matter.
        • Winning vs losing: students who won a “better” school gained no academic edge.
        • Opting out signals motivation: choosers were already smarter and more academically driven.
        • Left-behind students: no test-score drop from the supposed brain drain.
        • Career academies: practical-skills tracks helped struggling students graduate at higher rates.
      • Reading the Data: Regression
        • Regression analysis: isolates correlations by holding many variables constant.
        • Correlation vs causality: X, Y, or a hidden third factor may drive the link.
        • ECLS data set: 20,000 children tracked from kindergarten through fifth grade.
        • Circuit-board metaphor: matching identical switches reveals a single factor’s true impact.
      • The Black-White Test Score Gap
        • Early gap erased: controlling for income, education, and mother’s age eliminates the kindergarten gap.
        • Gap reappears by first grade: equivalent black children underperform whites within two years.
        • Bad schools, not bad students: black children disproportionately attend troubled schools.
        • Bad-school/good-school gap: students in bad schools lose ground; black students in good schools outperform whites in poor schools.
      • What Actually Matters
        • Matters: educated parents, high socioeconomic status, older first-time mother, books in home, PTA involvement, English-speaking home, low birthweight, adoption.
        • Doesn’t matter: intact family, better neighborhood, stay-at-home mother, Head Start, museums, spanking, TV, daily reading.
        • Parenting truth: who parents are matters more than what they do.
    • Epilogue · XII
      • What Matters vs. What Doesn’t
        • Eight ECLS factors correlate with test scores: educated parents, high SES, older mother, low birthweight, English, adoption, PTA, books.
        • Eight factors don’t correlate: intact family, better neighborhood, stay-at-home mom, Head Start, museums, spanking, TV, reading aloud.
        • Head Start fails to lift scores: most teachers lack bachelor’s degrees and earn about $21,000.
        • Spanking shows no negative correlation; parents admitting it may simply be honest, and honesty helps parenting.
        • Parenting technique is overrated; who you are matters more than what you do.
      • Indicators, Not Causes
        • Books in the home predict success but don’t cause it; educated parents buy books and pass on advantages.
        • Reading aloud shows no correlation; Governor Blagojevich’s book-mailing plan rested on the same false inference.
        • A book is an indicator, not a talisman or osmotic brain-booster.
        • Adopted children score lower despite smarter adoptive parents, suggesting genetic force in childhood.
        • Sacerdote’s The Nature and Nurture of Economic Outcomes finds adoptees later gain college, jobs, and stable marriage—parenting effects emerge in adulthood.
      • The Naming Signal
        • Winner and Loser Lane invert expectations: Loser became a police sergeant; Winner compiled dozens of arrests.
        • Temptress and Amcher show odd names signal poor parenting, not determine a child’s fate.
        • Fryer’s California birth data (16 million since 1961) reveals a recent black-white naming divergence.
        • Black Power likely sparked distinctively black names; they persist as cultural markers after afros and dashikis faded.
        • Black names signal community solidarity; unmarried, low-income, undereducated teen mothers choose them most.
        • A name sends a signal about parents, not a destiny; the parent’s life shows up in the name.
    • Epilogue · XIII
      • Audit Studies and Name-Change Puzzles
        • Audit studies: identical résumés with white vs. black names show white names get more callbacks.
        • Key limit: they cannot tell whether rejection stems from racism or from signals of disadvantaged background.
        • Unmeasured terrain: interviews, black-community name penalties, and real-life outcomes remain unexplored.
        • Name changes: people change names for economic or aesthetic reasons, from livery-cab drivers to Hollywood stars.
        • Court records: NYC name changes are at an all-time high, often economic in motive.
      • The California Data and Causation
        • Data chain: linking mothers’ birth records to their children reveals actual life outcomes.
        • Finding: distinctively black names correlate with worse education, income, and health outcomes.
        • Cause: names are not the cause; family, neighborhood, and economic circumstances are.
        • Indicator: a name signals parental background, like a bookless home signals lower test scores.
        • Motivation: anyone who changes a name for success is motivated, and motivation predicts outcomes.
      • Name Sorting by Class and Education
        • Income split: high-end names (Alexandra, Benjamin) differ sharply from low-end names (Amber, Cody).
        • Education split: mothers’ education maps to names; even “Jasmine” spellings rank by schooling.
        • Low-education tells: nicknames and misspellings (Ricky, Micheal, Tylor) mark low-education parents.
        • High-education names: literary, Hebrew, and traditional names (Lucienne, Dov, Finnegan) dominate lists.
        • Celebrity effect: Britney Spears and Madonna are symptoms, not causes, of naming booms.
        • Lifecycle: as high-status names spread downward, high-status parents abandon them.
      • Future Name Trends
        • Rapid turnover: top names from 1960 and 1980 are almost entirely gone by 2000.
        • Next wave: obscure “smart” names like Aviva, Waverly, Ansel, and Finnegan may go mainstream.
        • Overexposure: current high-end names—Alexandra, Lauren, Madison—are already on their way out.
        • Universal signal: every parent uses a name to signal something, however unique or trendy.
    • Epilogue · XIV
      • The Freakonomics Method
        • No unifying theme: the book’s common thread is thinking sensibly about how people behave in the real world.
        • Novel viewpoint: requires looking, discerning, and measuring in unexpected ways, not supersophisticated thinking.
        • Reverse engineering: figure out what a typical gang member or sumo wrestler already knew, but in reverse.
        • Practical payoff: unlikely to improve life materially; maybe a safer pool or a harder-working agent.
      • A Different Lens
        • Subtle effect: readers grow skeptical of conventional wisdom and notice things aren’t what they seem.
        • Data mining: seek data troves and balance intelligence with intuition to reach a glimmering new idea.
        • Uncomfortable truths: claims like abortion reducing crime trigger explosive moral reactions.
        • Economics vs. morality: morality is an ideal world; economics represents the actual world.
      • How Much Do Parents Matter?
        • Parental influence: matters greatly in ways determined before birth, and not at all in the ways we obsess over.
        • Name signaling: parents use names to signal expectations, though the name makes little difference.
        • Trying anyway: a high-end first name lets parents feel they did their best.
        • Random effect: even the best parenting efforts can be derailed by huge random forces.
        • Two paths to Harvard: Roland Fryer Jr., once a gangster, became a Harvard economist; Ted Kaczynski, once privileged, became the Unabomber.
  • Bonus Material Added to the Revised and Expanded 2006 Edition
    • The Rogue Economist's Curious Mind (Bonus Material Added to the Revised and Expanded 2006 Edition · I)
      • The Rogue Economist's Approach
        • Not an economist, by his own account: pleads ignorance of markets, taxes, math, and theory
        • Right questions over right tools: economics is a science with excellent tools but a shortage of interesting questions
        • Intuitionist detective: sifts data for stories no one else found; measures the unmeasurable
        • Everyday riddles: a homeless man's $50 headphones—"nicer than the ones I have"—invite his curiosity
      • Crime Research and Its Fallout
        • Police deter violent crime: election-cycle hiring spikes let him unlink police numbers from crime rates
        • Abortion-crime theory: Roe v. Wade averted births among poor, single, teen mothers; crime fell later
        • Tidy syllogism: unwantedness causes crime; abortion reduces unwantedness; abortion reduces crime
        • 1990s crime drop: more police, more prisoners, waning crack epidemic, abortion—Giuliani's policing wasn't one
      • Catching Cheaters and Studying Gangs
        • Teacher-cheating algorithms: multinomial logit models flag suspicious answer strings in test data
        • Cheating classroom signature: big gains in cheating year, then small gains or declines afterward
        • Chicago schools acted: retested students, fired cheaters; good teachers surfaced too
        • Drug-dealing as business: crack gang finances analyzed like a corporation; street dealers earn terrible pay
      • The Improbable Career
        • Math-phobic at MIT: one college math course; classmates wrote him off as having "no future"
        • Papers over problem sets: "the way you succeed in this profession is you write great papers"
        • Campaign spending study: hand-typed election data; money's impact is one-tenth the accepted figure
        • Society of Fellows rescue: Robert Nozick: at twenty-six, why must he have a unifying theme?
      • From Outsider to Demigod
        • Fits everywhere and nowhere: claimed by behavioralists, Chicago price theorists, and Cambridge alike
        • Camerer's verdict: creative demigod who kept the spark math usually bores out of economists
        • Gary Becker's model: Chicago championed offbeat topics—family and crime—despite years of demonization
        • Hamermesh's doubt: "I can't see anything wrong with it... I don't believe a word of it"
        • Accidental provocateur: genial and low-key; his aim is catching wrongdoers with clever data
    • Grief, Data, and Odd Incentives (Bonus Material Added to the Revised and Expanded 2006 Edition · II)
      • Levitt: Loss, Real Estate, and Self-Doubt
        • Andrew’s death: an ordinary ear infection became fatal meningitis; grief reshaped Levitt’s family and research.
        • Swimming pools vs. guns: pools are nearly 100 times more likely than guns to kill a child, yet rarely make news.
        • Real-estate conflict: agents gain little from a higher sale price, so they steer sellers toward fast, cheap deals.
        • Agent-owned homes: they stayed on market 10 days longer and sold for 2 percent more than comparable client homes.
        • Honest weaknesses: Levitt’s self-deprecation pairs with trust in data: teachers and agents may lie, numbers don’t.
        • Future targets: tax evasion, money laundering, and terrorist-catching tools—ambitious problems he feels ready for.
      • Up in Smoke: The Crack Index
        • News vs. data: crack coverage faded, but arrests, ER visits, and deaths show consumption stayed surprisingly high.
        • Crack index: use spiked in 1985, peaked in 1989, and remained near 70 percent of peak by 2000.
        • Violence was business: dealer turf wars, not addict crime, drove the homicide surge among young black men.
        • Economics cooled the market: falling demand and price competition shrank profits, so corners weren’t worth killing for.
        • Cheaper crack changed users: price fell 75 percent, leaving fewer users who each smoke far more.
        • Outdated sentencing: the 1986 law punishing 5 grams of crack like 500 of powder no longer matches social costs.
      • Does the Truth Lie Within? Self-Experimentation
        • Body as laboratory: Berkeley psychologist Seth Roberts spent decades rigorously testing fixes on himself.
        • Unorthodox transparency: no control group, but no hidden motives; exploratory data can beat flawed lab studies.
        • Stone Age fixes: morning light, skipped breakfast, standing, and life-size talking-head TV lifted his mood.
        • Set-point theory: fat stores calories like money; scarcity lowers hunger, abundance demands deposits.
        • Shangri-La Diet: unflavored oil and fructose water deliver calories without triggering flavor-fueled overeating.
        • Outcome: Roberts lost 40 pounds and kept it off, though commercial acceptance remains unproven.
      • Curbing Your Dog: Technology and Social Norms
        • Horse manure precedent: streetcars and automobiles solved New York’s 2,500-ton daily horse-dung crisis.
        • Weak legal deterrence: a $50 fine and roughly a 1-in-8,000 ticket risk make enforcement almost meaningless.
        • Social incentives rule: guilt and the glare of passers-by do the real work of getting owners to scoop.
        • Residual failure: dog waste still accounts for 20 percent of the Parks Department’s cleanliness failures.
    • Incentives, Prices, and Hidden Information (Bonus Material Added to the Revised and Expanded 2006 Edition · III)
      • The Dog-Poop DNA Solution
        • Misuse framing: treat dog poop like gun crime—punish the misuse, not the beloved object itself.
        • DNA licensing plan: samples filed at licensing; sidewalk piles matched by DNA; tickets mailed to owners.
        • Cost–benefit: $30 million buys clean streets if deterrence works, or seed money for fines if it fails.
        • Licensing flaw: only 102,004 of New York's dogs are licensed; responsible owners are least likely to offend.
        • Proposed fix: pay owners to license dogs and enforce random street checks under broken-windows policy.
        • Idea's reach: Vienna, Dresden, and a Hoboken eighth-grader proposed the same plan; adults dismissed her.
      • Why Vote?
        • Rational paradox: voting costs time and effort with negligible personal payoff—a rational person abstains.
        • Pivotal-vote odds: median victory margin was 22–25 percent; only one U.S. House race in a century hinged on one vote.
        • Closeness trap: the tighter the race, the more likely courts or officials decide it—as in 2000.
        • Three motives: delusion, lottery-ticket fantasy, or guilt from civic-duty socialization.
        • Swiss experiment: mail-in ballots lowered voting costs, yet turnout fell—especially in small communities.
        • Social self-interest: being seen at the polls earns esteem and avoids gossip; the real payoff is social.
      • The Economy of Desire
        • Broader price: waiting time, health costs, and moral judgments are all part of an item's true price.
        • Sexual substitution: prison spikes the price of straight sex; teens treat oral sex as a cheaper alternative to intercourse.
        • AIDS price spike: in 1992, one unprotected gay encounter carried roughly $1,924 in mortality risk.
        • Condom premium: Mexican prostitutes earned a 24 percent surcharge for sex without a condom.
        • Francis's finding: men with a relative dying of AIDS reported no recent gay sex or homosexual identity.
        • Economic desire: sexual preference may respond to price signals, not just biology—everything has its price.
      • Hoodwinked?
        • Information asymmetry: the Klan's secrecy terrorized through hidden knowledge; Kennedy inverted the imbalance.
        • Infiltration tactics: false identity, a "klavalier" post, and relentless leaking to prosecutors and radio shows.
        • Celebrated impact: helped quash the postwar Klan revival; honored with a Woody Guthrie song and a Florida day.
        • Green's doubt: author Ben Green, researching Harry T. Moore, began questioning Kennedy's story's accuracy.
        • Archive investigation: Kennedy's papers in New York and Atlanta charted his colorful activist life—and raised flags.
    • Unmasking Narratives, Tax Incentives, and Aftermath (Bonus Material Added to the Revised and Expanded 2006 Edition · IV)
      • Stetson Kennedy Unmasked
        • Archives vs. memoir: Kennedy recast legitimate interviews and public Klan events as undercover exploits.
        • Real informant: a former Klansman named John Brown infiltrated; Kennedy relayed his reports as his own.
        • Mailed memberships: the archives suggest he joined most hate groups by mail, not undercover.
        • Partial admission: Kennedy denied fabrication but conceded merging another man's reports; Dan Duke called the account untrue.
        • Silent skeptics: most knew and stayed quiet—"like killing Santa Claus"—until Green labeled The Klan Unmasked "a novelization."
        • Freakonomics lesson: a chain of self-interested anecdotes fed the legend; Kennedy mastered information asymmetry until archives caught up.
      • Filling in the Tax Gap
        • Tax gap: $345 billion went unpaid—nearly one-fifth of I.R.S. collections and more than $1,000 per citizen.
        • Compliance incentives: 96% affirm civic duty, but reporting is driven by fear of audit and third-party verification.
        • Reporting asymmetry: wages are verified by employers and withholding; self-employment income is self-reported, so 57% goes unreported.
        • Tiny audit risk: with face-to-face audits on just 0.19% of individual returns, cheating is a rational response.
        • Political bind: the I.R.S. enforces a hated code written by Congress; politicians who favor tough audits, like Dukakis, suffer.
        • Szilagyi's fix: requiring dependents' Social Security numbers erased seven million phantom dependents and raised $3 billion; his reward was $25,000.
      • From the Freakonomics Blog
        • Blog as addendum: these edited posts are about 3% of the blog; reader comments are often richer than the posts.
        • Four clusters: excerpts cover Freakonomics's aftermath, abortion/crime research, random reflections, and personal rants.
        • Title logic: a shocking name like Freakonomics cuts through clutter, then becomes familiar—like Oprah or The Beatles.
        • No unifying theme: great stories and data can carry a book; themes are convention, not necessity.
        • Welcoming critics: the authors posted negative reviews to honor the Freakonomics spirit of following data anywhere.
        • Roundtable: Crooked Timber's academic seminar plus author replies deepened the conversation around the book.
    • Rogue Economics, Incentives, Abortion-Crime (Bonus Material Added to the Revised and Expanded 2006 Edition · V)
      • The Rogue Economist's Credo
        • Adisciplinary path: real skills are asking interesting questions and tricking data, not mastering one discipline.
        • Open co-authorship: works with an ethnographer, econometrician, political scientist, and journalist; ignorance fuels openness.
        • False mastery: economists get in trouble from believing they can be good at everything.
      • The Incentives Lens
        • Widened incentives: must include financial, social, and moral; tautology risk, but narrow money focus is misguided.
        • Empathic inference: asks "What would I do?"—abortion as insurance, sumo deals, real-estate agents as swindlers.
        • Unifying theme: incentives, even implicit ones, drive his research and his rogue identity.
        • Rogue tolerance: one tolerated rogue economist means there is room for more.
      • A California Book Tour
        • Publisher push: HarperCollins sent them west because California sales lagged; Levitt professed antisocial misery.
        • Google stage: packed room, hundreds of books passed out, tag-team talk, rock-star moment.
        • Best question: "What would you do with our data?"—he will get back to them.
        • Google culture: T-shirt pride, happy smart people, mission; a $297 stock price helps.
      • The Abortion-Crime Controversy
        • Reader reaction: abortion-crime theory drew less hate mail than Realtors, cheating teachers, parenting, or naming chapters.
        • Bennett's gaffe: offhand claim that aborting every black baby would cut crime; contradicted his stated doubt.
        • Race not central: controlling for income, family structure, and urbanicity erases the racial crime gap except homicide.
        • Choice vs. coercion: most abortions shift birth timing, not total births; forced reproduction differs fundamentally from women's choice.
      • Defending the Research
        • Foote-Goetz critique: correcting state-year interactions and cohort size makes original Table 7 results disappear.
        • One of four: critics attack the most speculative analysis; three other evidence approaches stand.
        • Noisy data: nearly 1,000 state-year interactions eat signal-to-noise, shrinking measured abortion effects.
        • Mobility and timing: using a state's rate twenty years earlier ignores cross-state migration and birth-month noise.
    • Measurement, Randomness, and Market Incentives (Bonus Material Added to the Revised and Expanded 2006 Edition · VI)
      • Abortion-Crime Link: Measurement Corrections
        • Age window: 19-year-olds in 1993 faced abortion exposure from mid-1972 to mid-1974, not just 1973.
        • Residence vs. procedure: census state-of-birth corrections and Guttmacher residence data reduce cross-state mobility error.
        • Instrumental variables: using CDC’s independent abortion series as an instrument purges attenuation bias from noisy proxies.
        • Stronger with better data: corrected measures restore statistically significant crime-reducing effects, supporting the unwantedness hypothesis.
        • Population controls: they shrink the estimated effect, but a large violent-crime impact persists—unwantedness isn’t the only channel.
        • Robustness: corrected estimates align with the original paper’s three other analyses using different sources of variation.
      • Randomness: Streaks and Shuffles
        • Pattern-seeking minds: people inventing coin-flip sequences produce fewer long streaks than pure chance does.
        • iPod shuffle: repeated songs by the same artist are ordinary random coincidence, not hidden bias.
        • Royals’ losing streak: a 35%-win team has about a 1-in-4,000 chance of losing 19 straight—expected roughly once a decade.
        • No moral cause: a bad team plus bad luck explains streaks; no need for “snakebit” or demoralization narratives.
        • Variability: when per-game win probability varies, long streaks are slightly less likely than the simple model predicts.
      • Wikipedia: Open Isn’t Accurate
        • Open editing: anyone can alter entries anytime, so Wikipedia’s flexibility is also a reliability flaw.
        • Amusing error: “List of Economists” briefly included Levitt, a non-economist, until a reader deleted him.
        • Black Sox myth: Wikipedia repeats a dirty-uniform origin; Eight Men Out dates the name to the scandal’s aftermath.
        • Verify claims: crowd-sourced “facts” need checking against authoritative sources; a T-shirt awaited hard evidence.
      • Peak Oil: Markets Adapt
        • Incentives work: rising prices reduce demand, expand supply, spur substitutes, and accelerate technological innovation.
        • Doomsayers’ record: Nostradamus, Malthus, and Ehrlich show dire predictions ignore market adjustment.
        • Gradual adjustment: offsetting a few percent annual gap means modest changes, not the end of civilization.
        • Self-defeating scare: the article’s own recession logic—high prices cut demand and prices slide—undercuts peak-oil catastrophe.
        • Price as signal: higher oil prices tell people to drop low-value trips and invest in hybrids, nuclear, or solar.
    • Incentives, Fear, and Everyday Strategy (Bonus Material Added to the Revised and Expanded 2006 Edition · VII)
      • Shark Attacks and Peak Oil
        • High oil prices: make substitutes like tar sands, bioethanol, and gas-to-liquids viable above $40 a barrel.
        • Market share: high prices push Saudi customers toward nonfundamentalist rival suppliers.
        • Media panic: peak-oil fear rises like shark-attack coverage even when fundamentals are stable.
        • Substitutes: market responses, not catastrophe, are the real oil story.
      • Is America Ready for an Organ-Donor Market?
        • Taboo market: moral objections to selling organs ignore existing markets for eggs, sperm, and surrogates.
        • Reform push: Satel and Epstein blast the IOM report for rejecting financial incentives.
        • Palatable incentives: tax breaks, insurance, scholarships, and retirement funds could nudge donation without cash.
        • LifeSharers: non-monetary incentive—organ donors get priority if they ever need a transplant.
      • Why Pay $36.09 for Rancid Chicken?
        • Anchoring: behavioral economics shows a high initial reference point shapes what feels fair.
        • Two anchors: diners could ask for a free meal (0%) or ask the manager what she could do (100%).
        • Fairness gamble: the manager bet the customer wouldn't cause a scene—and kept the concession small.
        • Perception gap: free wine felt like slim recompense to the one who actually tasted the rancid chicken.
      • Making Profits from Incivility on the Roads
        • Identity: people wait in line because cutting would force them to rethink who they are.
        • Anonymity: cars let drivers misbehave without facing lasting social consequences.
        • Targeted tickets: police ticketing line-cutters makes $1,500 per officer-hour and nails mean behavior.
        • Broken windows: punishing small incivilities is efficient and delights rule-following drivers.
      • Vegas Rules
        • Casino discretion: a dealer and supervisor bent the blackjack rules when Levitt accidentally hit on 21.
        • Customer loyalty: one small concession turned a rookie gambler into a Caesars regular.
        • Racetrack eye: Levitt bet a maiden horse at 7/2 and it won wire to wire.
      • I Almost Got Sent to Guantánamo
        • Profiling triggers: a last-minute one-way ticket and terrorism research got Levitt pulled from the line.
        • Absurd search: thirty minutes over 12 pockets turned up lip gloss, linty pills, and an old book.
        • Close call: leaving the terrorist handbook at home was all that stopped a flight to Cuba.
      • Nobel Prize Winner Thomas Schelling
        • Teacher of strategy: Schelling's Econ 1030 used stories to make simple game theory vivid.
        • Key tools: Prisoner's Dilemma, tipping points, tragedy of the commons, and commitment devices.
        • Disappointment: modern game theory grew overly mathematical and lost touch with daily life.
  • Acknowledgments
    • Front Matter, Not Core Content
      • Acknowledgments: a list of names, institutions, and personal thanks — no arguments, evidence, or ideas to map
      • Curatorial call: this section yields nothing to distill; the book's core content begins with its first chapter
  • Searchable Terms
    • Incentives: The Cornerstone of Modern Life
      • Incentives: the hidden engine of behavior; study them and puzzling events resolve
      • Economic, social, moral: three flavors of incentive, frequently pulling against one another
      • Bright-line vs. murky rules: clear ones get gamed, fuzzy ones breed negotiation and evasion
      • Trade-offs: every incentive scheme produces unintended responses its designer never imagined
      • Cheating: the primordial economic act, a natural reply where payoff exceeds cost
    • Information Asymmetry and the Experts Who Exploit It
      • Asymmetric information: experts know more than clients and profit from the gap
      • Real-estate agents: their commission rewards a fast sale, not your highest price
      • Auto mechanics, funeral directors: professions where seller and buyer interests diverge
      • The Internet: a cheap remedy dissolving expert advantage in dating, shopping, insurance
      • False and edited information: experts and media withhold, spin, and abuse what they know
    • Crime, Abortion, and the Search for Root Causes
      • Legalized abortion: the strongest explanation for the 1990s crime drop — fewer unwanted children
      • Rival theories rejected: gun control, capital punishment, tougher laws, and policing explain less than claimed
      • Superpredators: the feared juvenile crime wave never arrived
      • Correlation vs. cause: pools and guns both kill children; fear follows the wrong risk
    • Cheating, Testing, and the Machinery of Detection
      • Teacher cheating: high-stakes testing rewards altering answer sheets, and algorithms catch it
      • Sumo wrestling: elite tournaments reveal rigged matches at key win-loss thresholds
      • Honor systems and pooled payments: honesty tracks the size of the ask more than virtue
      • Sports and finance: drugs, fixed matches, insider trading — cheating scales with the stakes
    • Names, Parenting, and the Limits of Parental Power
      • Baby names: status markers whose signal shifts as they spread across classes
      • What parents do vs. who parents are: the latter predicts outcomes better than parenting advice
      • Adoption and twin studies: nature and nurture are measurable; parental influence is narrower than believed
      • Test scores: racial gaps appear before school starts, so schooling alone cannot explain them
      • “Acting white”: an identity cost that can tax black achievement
    • Conventional Wisdom and the Freakonomics Method
      • Conventional wisdom: sloppy, inaccurate, and shaped by the incentives of experts and journalists
      • Morality vs. science: economics can study how people behave without prescribing how they should
      • Data over intuition: real theories hide in gang ledgers, school records, and contest statistics
      • Stetson Kennedy's applied folklore: exposing Klan rituals stripped the organization of mystique and revenue
      • Gangs and the Klan as firms: both operate on incentives, hierarchy, revenue, and information
• Core Conclusion and Practical Takeaways
  • The Core Ideas
    • Incentives are the engine: every riddle — cheating, crime, real estate — resolves once you find the payoff
    • Economics as a way of seeing: morality describes the world we want; economics, how it actually works
    • No unifying theme: curiosity plus good data beats a grand theory
    • Correlation is not causation: X may cause Y, Y may cause X, or a hidden Z drives both
    • Conventional wisdom is often wrong: simple, convenient, comfortable — and rarely true
  • The Incentives Lens
    • Three flavors: economic, social, and moral incentives often pull against one another
    • Small fines backfire: a $3 late-pickup fine bought off parental guilt and doubled late arrivals
    • Money can crowd out morality: paying for blood donations cut giving by turning charity into bad pay
    • Unintended responses are inevitable: every scheme draws people who try to beat it
    • Empathic inference: ask what you would do under those incentives before judging the behavior
  • Experts, Information, and Power
    • Asymmetric information: experts profit from the gap between what they know and what you can verify
    • Real-estate conflict: agents push a fast decent offer for you but wait and earn more selling their own homes
    • Fear is leverage: doctors, dealers, and funeral directors exploit ignorance and anxiety
    • The Internet is a disinfectant: price comparison shrinks expert advantage — term life saved buyers $1 billion yearly
    • Sunlight rule: exposure, as with the Klan's leaked rituals, destroys power built on secrecy
  • Hidden Causes and Cheating
    • High stakes breed cheating: tie scores to jobs and teachers alter answer sheets; algorithms catch identical strings
    • Detection works: Chicago's retests and a dozen firings cut cheating by more than 30 percent
    • Root causes are distant: legalized abortion, not the economy or policing fads, best explains the 1990s crime drop
    • Gangs are firms: foot soldiers earned $3.30 an hour, a tournament for the top 2.2% payout
    • Unwantedness predicts crime: Romania's abortion ban produced a cohort that did worse in school, work, and crime
  • Parenting, Names, and Risk
    • Who parents are beats what they do: educated parents, older mothers, and books predict outcomes better than technique
    • Indicators, not talismans: books and reading aloud signal parental background; they don't manufacture success
    • Names signal parents, not destiny: distinctively black names track disadvantage without causing it
    • Genes and peers matter: adoption studies show little correlation with adopted parents' traits
    • Fear misreads risk: pools kill children at nearly 100 times the rate of guns
  • Mindset Shifts and Practices
    • Ask who benefits: before accepting expert advice, map that expert's incentives
    • Test the obvious claim: campaign spending, gun laws, and policing fads explain far less than credited
    • Find the natural experiment: lotteries, retests, and consecutive races isolate causes cleanly
    • Prefer small targeted fixes: secure the pool, scoop the poop — cheap specific interventions beat grand crusades
    • Follow motivation, not mechanism: motivated people succeed, and the signal reveals the person