Examines the emergence, or re-emergence, of a large number of nations as partners and donors in international development, from global powers such as Brazil, China and India, to Gulf states such as Saudi Arabia, to former socialist states such as Poland and Russia

In response to the recent migrant and refugee crisis, rich countries have redoubled policy efforts to deter future immigration from poor countries by addressing the "root causes" of migration. We review existing evidence on the effectiveness of such efforts. First, aid disbursements do not...