Page 345 Example 4: The Congressional Budget Office annual reports can be found at the Congressional Budget Office website, www.cbo.gov.

Page 349 Example 7: Laura L. Calderon et al., “Risk factors for obesity in Mexican-American girls: dietary factors, anthropometric factors, physical activity, and hours of television viewing,” Journal of the American Dietetic Association, 96 (1996), pp. 1177–1179.

Page 351 Studies mentioned in the Statistical Controversies feature are John R. Lott Jr., More Guns, Less Crime: Understanding Crime and Gun Control Laws, University of Chicago Press, 1998; Andrés Villaveces et al., “Effect of a ban on carrying firearms on homicide rates in 2 Colombian cities,” Journal of the American Medical Association, 283 (2000), pp. 1205–1209; see also the editorial by Lawrence W. Sherman in the same issue. See also Lawrence W. Sherman, James W. Shaw, and Dennis P. Rogan, “The Kansas City gun experiment,” National Institute of Justice, 1995.

Page 352 Information about cancer statistics can be obtained from the U.S. Cancer Statistics Working Group, http://apps.nccd.cdc.gov/uscs/index.aspx.

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Page 353 For more discussion of issues surrounding big data, see Tim Harford, “Big data: are we making a big mistake?” Significance, 11 (2014), pp. 14–19.

Page 359 Exercise 15.15: Data estimated from graphs found at the World Health Orga-nization website, www.who.int/substance_abuse/publications/globalstatusreportalcoholprofiles/en/index.html.

Page 360 Exercise 15.17: Data estimated from a graph in G. D. Martinsen, E. M. Driebe, and T. G. Whitham, “Indirect interactions mediated by changing plant chemistry: beaver browsing benefits beetles,” Ecology, 79 (1998), pp. 192–200.

Page 361 Exercise 15.22: W. M. Lewis and M. C. Grant, “Acid precipitation in the western United States,” Science, 207 (1980), pp. 176–177.

Page 364 Exercise 15.33: David E. Bloom and David Canning, “The health and wealth of nations,” Science, 287 (2000), pp. 1207–1208.

Page 364 Exercise 15.34: Quotation from a Gannett News Service article appearing in the Lafayette (Ind.) Journal and Courier, April 23, 1994.