『SuperFreakonomics』要約

SuperFreakonomics, by economist Steven D. Levitt and journalist Stephen J. Dubner, is the 2009 follow-up to Freakonomics. The book applies economic reasoning and data analysis to an eclectic mix of topics, aiming to uncover hidden incentives behind human behavior. Its central method is treating economics as a toolkit for examining unconventional questions, often arriving at counterintuitive conclusions. A prominent thread concerns the economics of prostitution, drawing on research by sociologist Sudhir Venkatesh, who studied street sex workers in Chicago. The authors compare their earnings and working conditions to those of department-store Santas and other low-wage workers, examining how competition and risk shape wages. Another chapter explores the surprising decline in drunk-driving fatalities, arguing that increased access to automobiles and changes in driving patterns mattered more than strict anti-drunk-driving laws. The book also revisits the economics of terrorism, suggesting that the backgrounds of suicide bombers are more varied than commonly assumed and that small, inexpensive interventions can shift behavior. A major recurring framework is the "law of unintended consequences" and the power of simple, cheap fixes over grand moral appeals. The authors discuss how hospital handwashing and checklist protocols can reduce infections, and how geoengineering ideas like pumping sulfur dioxide into the stratosphere might cool the planet at low cost. They also examine the link between television and crime in India, arguing that expanded TV access reduced violence by exposing viewers to different norms. Throughout, the book emphasizes empirical data, natural experiments, and the idea that people respond to incentives in predictable but often overlooked ways. It remains a popular example of pop economics applied to everyday puzzles.