Skilled Human Capital and High-Growth Entrepreneurship: Evidence from Inventor Inflows

To what extent does high-growth entrepreneurship depend on skilled human capital? We estimate the impact of the inflow of inventors into a region on the founding of high-growth firms, instrumenting mobility with the county-level share of millions of inventor surnames in the 1940 U.S. Census. Inventor immigration increases county-level high-growth entrepreneurship; estimates range from 29-55 immigrating inventors for each new high-growth firm, depending on the region and model. We also find a smaller but significant negative effect of inventor arrival on entrepreneurship in nearby counties.