Introduction / Ina Ganguli, Shulamit Kahn, and Megan MacGarvie --I. Location choices of international students and return migration.Return migrants' self-selection : evidence for Indian inventors /Stefano Breschi, Francesco Lissoni, and Ernest Miguelez --Will the U.S. keep the best and the...

Introduction /Petra Moser --The roots of agricultural innovation : patent evidence of knowledge spillovers /Matthew Clancy, Paul Hesiey, Yongjie Ji, GianCarlo Moschini --Comment /Alberto Galasso --Quantifying heterogeneous returns to genetic selection : evidence from Wisconsin dairies /Jared...