Natives benefit from immigration mainly because of production complementarities between immigrant workers and other factors of production, and these benefits are larger when immigrants are sufficiently 'different' from the stock of native productive inputs. The available evidence suggests that...

It has been difficult to open up the black box of knowledge production. We use unique international data on the publications, citations, and affiliations of mathematicians to examine the impact of a large post-1992 influx of Soviet mathematicians on the productivity of their American...

Many economists believe that knowledge production generates positive spillovers among knowledge producers. We argue that spillovers may exist on at least three dimensions (in idea, geographic, and collaboration space), and that the strength or weakness of the spillover effects can vary across...