Despite a well-established correlation between alcohol intake and various risk-taking sexual behaviors, the causality remains unknown. The observed association can be easily attributed to the influence of unobserved individual characteristics rather than the influence of substance use. I model...

The 2006 FDA ruling made Plan B, the popular brand of emergency contraception (EC), available without a doctor's prescription to women 18 and older; women younger than 18 still have to produce a doctor's prescription for the drug. We hypothesize that since unplanned pregnancies are more likely...