An economic analysis of the post World War II decline in the Japanese crime rate

Since the end of World War II there has been a dramatic decrease in reported Japanese crime. Adult arrest rates have fallen steadily since the early 1950s and juvenile arrest rates have fallen since the early 1960s. An economic analysis of crime predicts that crime rates depend upon returns to crime relative to returns in legal pursuits and the certainty and severity of punishment. Regression analysis is used to test this theory using Japanese data. The empirical results indicate that the economic model does not outperform alternative naive models. However, the results are consistent with the hypothesis that increases in returns to legitimate work diminish both adult and juvenile crime. Unemployment affects some adult crimes but has little impact on juvenile crime. The share of the population in poverty has no significant impact on either type of crime. Increases in the certainty of punishment deters adult crime but there is little evidence that increases in either the certainty or the severity of punishment deter juvenile crime. There is weak evidence to support the hypothesis that increases in the severity of adult punishments deter crime.