Do Foreign Experts Increase the Productivity of Domestic Firms?

While most countries welcome (and some even subsidize) high-skilled immigrants, there is very limited evidence of their importance for domestic firms. To guide our empirical analysis, we first set up a simple theoretical model to show how foreign experts can affect the productivity and wages of domestic firms. Using matched worker-firm data from Denmark and a matching difference-in-differences approach, we then find that firms that hire foreign experts instead of domestic experts become more productive, in the sense that they pay higher wages to high-skilled co-workers.