Same‐Sex Marriage Legalization and Sexually Transmitted Infections Across Europe*
利用欧洲国家面板数据，研究发现同性婚姻法降低了普通人群中性传播感染（如梅毒、淋病、HIV/AIDS）的传播，对高风险群体（男男性行为者）效果更显著，并带来正向健康外部性。
Abstract I examine how same‐sex marriage laws affect sexually transmitted infection (STI) rates, using country‐level panel data from Europe. Dynamic difference‐in‐differences models show that same‐sex marriage laws decrease the spread of shorter‐term (syphilis, gonorrhoea) and longer‐term infections (HIV, AIDS) among the general population. These effects are persistent over time and are much stronger than other same‐sex relationship recognition policies. Further investigation reveals significant heterogeneity; same‐sex marriage laws lead to sizeable decreases in all STIs among the most at‐risk population for an infection, men who have sex with men, with additional positive externalities on the health capital of heterosexual men and women.