Freakonomics

INTRODUCTION: THE HIDDEN SIDE OF EVERYTHING

THE FALL AND FALL OF CRIME: The crime-drop argument can be found in Steven D. Levitt, “Understanding Why Crime Fell in the 1990’s: Four Factors That Explain the Decline and Six That Do Not,” Journal of Economic Perspectives 18, no. 1 (2004), pp. 163–90. / 3–4 The superpredator: See Eric Pooley, “Kids with Guns,” New York Magazine, August 9, 1991; John J. DiIulio Jr., “The Coming of the Super-Predators,” Weekly Standard, November 27, 1995; Tom Morganthau, “The Lull Before the Storm?” Newsweek, December 4, 1995; Richard Zoglin, “Now for the Bad News: A Teenage Time Bomb,” Time, January 15, 1996; and Ted Gest, “Crime Time Bomb,” U.S. News & World Report, March 25, 1996. / 4 James Alan Fox’s dire predictions can be found in a pair of government reports: “Trends in Juvenile Violence: A Report to the United States Attorney General on Current and Future Rates of Juvenile Offending” (Washington, D.C.: Bureau of Justice Statistics, 1996) and “Trends in Juvenile Violence: An Update” (Washington, D.C.: Bureau of Justice Statistics, 1997). / 4 President Clinton’s fearful comment came during a 1997 speech in Boston a

THE REAL REAL-ESTATE STORY: The study measuring how a real-estate agent treats the sale of her own home versus a client’s home is Steven D. Levitt and Chad Syverson, “Market Distortions When Agents Are Better Informed: A Theoretical and Empirical Exploration of the Value of Information in Real Estate Transactions,” National Bureau of Economic Research working paper, 2005. / 7– 8 The lax California auto mechanics are discussed in Thomas Hubbard, “An Empirical Examination of Moral Hazard in the Vehicle Inspection Market,” RAND Journal of Economics 29, no. 1 (1998), pp. 406–26; and in Thomas Hubbard, “How Do Consumers Motivate Experts? Reputational Incentives in an Auto Repair Market,” Journal of Law & Economics 45, no. 2 (2002), pp. 437–68. / 8 Doctors who perform extra C-sections are examined in Jonathan Gruber and Maria Owings, “Physician Financial Incentives and Caesarean Section Delivery,” RAND Journal of Economics 27, no. 1 (1996), pp. 99–123.

THE MYTH OF CAMPAIGN SPENDING is told in greater detail in a trio of papers: Steven D. Levitt, “Using Repeat Challengers to Estimate the Effect of Campaign Spending on Election Outcomes in the U.S. House,” Journal of Political Economy, August 1994, pp. 777–98; Steven D. Levitt, “Congressional Campaign Finance Reform,” Journal of Economic Perspectives 9 (1995), pp. 183– 93; and Steven D. Levitt and James M. Snyder Jr., “The Impact of Federal Spending on House Election Outcomes,” Journal of Political Economy 105, no. 1 (1997), pp. 30–53.

EIGHT GLASSES OF WATER A DAY: See Robert J. Davis, “Can Water Aid Weight Loss?” Wall Street Journal, March 16, 2004, which cites an Institute of Medicine report concluding that “there is no scientific basis for the recommendation [of eight glasses of water a day] and that most people get enough water through normal consumption of foods and beverages.”

ADAM SMITH is still well worth reading, of course (especially if you have infinite patience); so too is Robert Heilbroner’s The Worldly Philosophers (New York: Simon & Schuster, 1953), which contains memorable profiles of Smith, Karl Marx, Thorstein Veblen, John Maynard Keynes, Joseph Schum-peter, and other giants of economics.

1. WHAT DO SCHOOLTEACHERS AND SUMO WRESTLERS HAVE IN COMMON?

THE ISRAELI DAY-CARE STUDY: See Uri Gneezy and Aldo Rustichini, “A Fine Is a Price,” Journal of Legal Studies 29, no. 1 (January 2000), pp. 1–17; and Uri Gneezy, “The ‘W’ Effect of Incentives,” University of Chicago working paper.

MURDER THROUGH THE AGES: See Manuel Eisner, “Secular Trends of Violence, Evidence, and Theoretical Interpretations,” Crime and Justice: A Review of Research 3 (2003); also presented in Manuel Eisner, “Violence and the Rise of Modern Society,” Criminology in Cambridge, October 2003, pp. 3–7.

THOMAS JEFFERSON ON CAUSE-AND-EFFECT: Autobiography of Thomas Jefferson (1829; reprint, New York: G.P. Putnam’s Sons, 1914), p. 156.

BLOOD FOR MONEY: See Richard M. Titmuss, “The Gift of Blood,” Transaction 8 (1971); also presented in The Philosophy of Welfare: Selected Writings by R. M. Titmuss, ed. B. Abel-Smith and K. Titmuss (London: Allen and Unwin, 1987). See also William E. Upton, “Altruism, Attribution, and Intrinsic Motivation in the Recruitment of Blood Donors,” Ph.D. diss., Cornell University, 1973.

WHEN SEVEN MILLION CHILDREN DISAPPEARED OVERNIGHT: See Jeffrey Liebman, “Who Are the Ineligible EITC Recipients?” National Tax Journal 53 (2000), pp. 1165–86. Liebman’s paper was citing John Szilagyi, “Where Some

of Those Dependents Went,” 1990 Research Conference Report: How Do We Affect Taxpayer Behavior? (Internal Revenue Service: March 1991), pp. 162–63.

CHEATING TEACHERS IN CHICAGO: This study, which also provides considerable background on high-stakes testing, is detailed in two papers: Brian A. Jacob and Steven D. Levitt, “Rotten Apples: An Investigation of the Prevalence and Predictors of Teacher Cheating,” Quarterly Journal of Economics 118, no. 3 (2003), pp. 843–77; and Brian A. Jacob and Steven D. Levitt, “Catching Cheating Teachers: The Results of an Unusual Experiment in Implementing Theory,” Brookings-Wharton Papers on Urban Affairs, 2003, pp. 185–209. / 27 The Oakland fifth-grader with the extra-helpful teacher: Based on an author interview with a former assistant superintendent of the Oakland Public Schools. / 34–35 Cheating among North Carolina teachers: See G. H. Gay, “Standardized Tests: Irregularities in Administering of Tests Affect Test Results,” Journal of Instructional Psychology 17, no. 2 (1990), pp. 93–103. / 35–37 The story of Arne Duncan, CEO of the Chicago schools, was based largely on author interviews; see also Amy D’Orio, “The Outsider Comes In,” District Administration: The Magazine for K–12 Education Leaders, August 2002; and various Chicago Tribune articles by Ray Quintanilla.

THE UNIVERSITY OF GEORGIA BASKETBALL TEST was made public when the university released 1,500 pages of documents in response to an investigation by the National Collegiate Athletic Association.

CHEATING IN SUMO: See Mark Duggan and Steven D. Levitt, “Wi

Two sumo whistleblowers die mysteriously: See Sheryl WuDu

THE BAGEL MAN: Paul Feldman was looking for a research economist to take an interest in his data, and brought himself to Steven Levitt’s attention. (Several other scholars had passed.) Levitt and then Dubner subsequently visited Feldman’s bagel operation near Washington, D.C. Their research led to an article that was substantially similar to the version of the story published here: Stephen J. Dubner and Steven D. Levitt, “What the Bagel Man Saw,” The New York Times Magazine, June 6, 2004. Levitt is also writing an academic paper about Feldman’s bagel operation. / 47 The “Beer on the Beach” study is discussed in Richard H. Thaler, “Mental Accounting and Consumer Choice,” Marketing Science 4 (Summer 1985), pp. 119–214; also worth reading is Richard H. Thaler, The Wi