This paper empirically tests diverse theoretical explanations for observed skills disparities between adult immigrants and non-immigrants. Using skills data from 100,000 adults (16-65) in 18 Western countries, we show that in almost all countries, adult immigrants are less numerically skilled...

Pooling data for 1905 to 2000, we find no systematic relationship between top income shares and economic growth in a panel of 12 developed nations observed for between 22 and 85 years. After 1960, however, a one percentage point rise in the top decile’s income share is associated with a...