In this chapter, I discuss the recent academic research on international migration, focusing on the causes and consequences of emigration from developing countries and the motivations behind the restrictions imposed by the developed countries on immigration. My aim is to identify facts about...

This chapter considers methods for evaluating the impact of social programs in the presence of nonrandom program placement or program selection. It first presents the evaluation problem as a missing data problem and then considers various solutions proposed in the statistics and econometrics...