Working Paper: NBER ID: w12577
Authors: Darius Lakdawalla; Tomas Philipson; Y. Richard Wang
Abstract: Patent protection spurs innovation by raising the rewards for research, but it usually results in less desirable allocations after the innovation has been discovered. In effect, patents reward inventors with inefficient monopoly power. However, previous analysis of intellectual property has focused only on the costs patents impose by restricting price-competition. We analyze the potentially important but overlooked role played by competition on dimensions other than price. Compared to a patent monopoly, competitive firms may engage in inefficient levels of non-price competition -- such as marketing -- when these activities confer benefits on competitors. Patent monopolies may thus price less efficiently, but market more efficiently than competitive firms. We measure the empirical importance of this issue, using patent-expiration data for the US pharmaceutical industry from 1990 to 2003. Contrary to what is predicted by price competition alone, we find that patent expirations actually have a negative effect on output for the first year after expiration. This results from the reduction in marketing effort, which offsets the reduction in price. The short-run decline in output costs consumers at least $400,000 per month, for each drug. In the long-run, however, expirations do raise output, but the value of expiration to consumers is about 15% lower than would be predicted by a model that considers price-competition alone, without marketing effort. The non-standard effects introduced by non-price competition alter the analysis of patents' welfare effects.
Keywords: Intellectual Property; Marketing; Pharmaceuticals; Consumer Welfare
JEL Codes: I11; I12; O34
Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.
| Cause | Effect |
|---|---|
| patent protection (O34) | innovation (O35) |
| patent protection (O34) | monopolistic inefficiencies (D42) |
| patent expirations (O34) | marketing efforts (M31) |
| patent expirations (O34) | output (C67) |
| reduction in marketing efforts (M31) | output (C67) |
| patent expirations (O34) | price competition (D41) |
| price competition (D41) | consumer welfare (D69) |
| patent expirations (O34) | long-term output (E23) |
| long-term output (E23) | consumer welfare (D69) |