OECD labor markets have become more “polarized” with employment in the middle of the skill distribution falling relative to the top and (in recent years) also the bottom of the skill distribution. We test the hypothesis of Autor, Levy, and Murnane (2003) that this is partly due to...

Since changes in trade openness are typically confounded with other factors, it has been difficult to identify the labour market consequences of increased international trade. The advent of the United States Interstate Highway System provides a unique policy experiment, which I use to identify...