Since the 1960s, the United States has undergone a surge in immigration. The share of the U.S. population that is foreign born surpassed 10% in 2000, with new immigrants accounting for nearly half of recent U.S. population growth. Three policy issues are central to the current debate about...

Integration of the labor markets between a rich country (North) and a poor country (South) often leads to high unemployment in the South and transfers from North to South: for instance, United States vs. Puerto Rico; West vs. East Germany; Northern vs. Southern Italy. We present a general...

Since the early 1980s, the U.S. economy has experienced a growing wage differential: high-skilled workers have claimed an increasing share of available income, while low-skilled workers have seen an absolute decline in real wages. How and why this disparity has arisen is a matter of ongoing...