Hackmann, Martin B.; Kolstad, Jonathan T.; Kowalski, … - National Bureau of Economic Research (NBER) - 2012
those who were insured prior to the reform. We find that counties with larger increases in insurance coverage over the … reform period face the smallest increase in average hospital costs for the insured population, consistent with adverse … selection into insurance before the reform. Additional results, incorporating cross-state variation and data on health measures …