Imagine a region suffering from a widening income gap that becomes eligible for a generous transfer programme (the treatment). Imagine difference-in-differences analysis (DD) — a before-and-after comparison of the income-level difference — shows that the handicap has risen. Most observers...

Immigration Economics synthesizes the theories, models, and econometric methods used to identify the causes and consequences of international labor flows. Economist George Borjas lays out with clarity and rigor a full spectrum of topics, including migrant worker selection and assimilation, the...