Scientists have always been ‘sans frontières’, driven by the need to acquire new knowledge and skills and to cooperate with colleagues irrespective of national borders or political divides. In fact, the migration of scientists between countries at all career stages has increased steadily over time. In a related but distinct trend, the incidence of co-authorship reflecting greater international ...

When productivity is fostered by both the individual’s human capital and by the average level of human capital in the economy, individuals under-invest in human capital. A strictly positive probability of migration to a richer country, by raising both the level of human capital formed by optimizing individuals in the home country and the average level of human capital of non-migrants in the cou...

In this essay, we focus on the moral justification of a highly controversial measure to redress medical brain drain: the duty to stay. We argue that the moral justification for this duty lies primarily in the fact that medical students impose high risks on their fellow citizens while receiving their medical training, which in turn gives them a reciprocity-based reason to temporarily prioritize ...