In this article, we conduct a comprehensive analysis of the effect of parental involvement (PI) laws on the incidence of abortions to minors across a span of nearly three decades. We contribute to the extant literature on this topic in several ways. First, we explore differences in estimates of...

I review the empirical comparative law literature with an emphasis on quantitative work. After situating the field and surveying its main applications to date, I turn to methodological issues. I discuss at length the obstacles to causal inference from comparative data, and caution against...