Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Using an annual panel of US states over the period 1982-2014, we estimate the response of macroeconomic variables to a shock to the number of new firms (startups). We find that these shocks have significant effects that persist for many years on real GDP, productivity, and population. This is consistent with simple models of firm dynamics where a "missing generation" of firms affects productivity persistently.