This paper analyzes the heterogeneity effect of immigration on earnings in-equality by decomposing the aggregate measure of total inequality. The analysis shows that a substantial portion of an increase in measured inequality could be due to shifts in shares of heterogeneous population groups...

In recent decades many countries have simultaneously liberalized their trading regimes and expanded their education systems. The theoretical effect of these regime shifts on the wage differential between skilled and unskilled workers is ambiguous. On the one hand, openness to trade causes demand...