We compare a set of econometric studies that measure the effect of net internal migration in neoclassical models of long-run real income convergence and derive 67 comparable effect sizes. The precision-weighted estimate of beta convergence is about 2.7%. An increase in the net migration rate of...

Since the early 1990s many empirical studies have been conducted on the impact of international migration on international trade, predominantly from the host country perspective. Because most studies have adopted broadly the same specification, namely a log-linear gravity model of export and...

While economic deprivation is an important determinant of civil conflict, it cannot completely explain the incentives for warfare. In irregular wars, for example, both incumbents and insurgents may employ various tactics to win the hearts and minds of civilians in order to muster territorial...

Are 'green' environmental concerns - about climate change, biodiversity, pollution - deterring today's citizens from having children? This paper, which we believe to be the first of its kind, reports preliminary evidence consistent with that increasingly discussed hypothesis. Our study has a...