Incentivizing Safer Sexual Behavior: Evidence from a Lottery Experiment on HIV Prevention
研究在莱索托实施了一项低预期支付但高额奖金的抽奖项目，参与者若性病检测为阴性即可获奖。结果显示该项目使艾滋病感染率在两年内降低21.4%，尤其对高风险行为者效果显著。
We investigate the effect of a financial lottery program in Lesotho with relatively low expected payments but a chance to win a high prize conditional on negative test results for sexually transmitted infections. The intervention resulted in a 21.4 percent reduction in HIV incidence over two years. Lottery incentives appear to be particularly effective in targeting individuals with ex ante risky sexual behavior, consistent with the hypothesis that lotteries are more valued by individuals willing to take risks.