We study how competition impacts innovation (and welfare) when firms compete both in the product market and in innovation development. This relationship is complex and may lead to scenarios in which a lessening of competition increases R&D and consumer welfare in the long run, contradicting...

I examine the impact of patent policy — characterized by patent length and strength — on R&D investment dynamics and the number of competitors in the context of sequential innovation. Overly protective policies introduce two distortions: they delay leaders' and followers' investments toward...

We study market entry decisions when firms have private information about their profitability. We generalize current models by allowing general forms of market competition and heterogeneous firms that self-select when entering the market. Post-entry profits depend on market structure, and on the...

In this paper we investigate the dual role of supply restrictions and drug treatment in combating the concurrent rise of opioid abuse and suicide in the United States over the last two decades. We find that supply-side interventions decrease suicides in places with strong addiction-help...

Slave property rights yielded a source of collateral as well as a coerced labor force. Using data from Dun and Bradstreet linked to the 1860 census and slave schedules in Maryland, we find that slaveowners were more likely to start businesses prior to the uncompensated 1864 emancipation, even...

In this paper we investigate the dual role of supply restrictions and drug treatment in combating the concurrent rise of opioid abuse and suicide in the United States over the last two decades. We find that supply-side interventions decrease suicides in places with strong addiction-help...

How do vertical mergers impact consumers? Though often presumed to eliminate double marginalization and generate efficiencies, theory predicts that vertical integration in multiproduct industries may cause price changes that hurt consumers even in the absence of market foreclosure. We measure...