Do Sex Workers Respond to Disease? Evidence from the Male Market for Sex
研究了发展中国家男性性市场中，性传播疾病发病率上升时，无保护性行为的溢价变化，发现疾病风险每增加1个百分点，溢价上升28%，市场力量可能抑制疾病的自限效应。
Sex markets play a key role in the transmission of sexually transmitted infections (STI) and HIV/AIDS in developing countries. While individuals should substitute away from risky sex as STI prevalence rises, female sex workers draw a premium for engaging in unprotected sex, mitigating their propensity to use condoms. We provide the first evidence of a positive premium for non-condom sex in developing country male sex markets. Testing whether this is a compensating differential for disease risk, we find that a one percentage point increase in the STI rate increases the premium 28 percent. Market forces may curb the self-limiting effect of STI epidemics.