Library Header Image
LSE Research Online LSE Library Services

Patent screening, innovation, and welfare

Schankerman, Mark and Schuett, Florian (2022) Patent screening, innovation, and welfare. Review of Economic Studies, 89 (4). 2101 – 2148. ISSN 0034-6527

[img] Text (rdab073) - Published Version
Available under License Creative Commons Attribution Non-commercial.

Download (642kB)

Identification Number: 10.1093/restud/rdab073


Critics claim that patent screening is ineffective, granting low-quality patents that impose unnecessary social costs. We develop an integrated framework, involving patent office exami- nation, fees, and endogenous validity challenges in the courts, to study patent screening both theoretically and quantitatively. In our model, some inventions require the patent incentive while others do not, and asymmetric information creates a need for screening. We show that the endogeneity of challenges implies that courts, even if perfect, cannot solve the screening problem. Simulations of the model, calibrated on U.S. data, indicate that screening is highly imperfect, with almost half of all patents issued on inventions that do not require the patent incentive. While we find that the current patent system generates positive social value, in- tensifying examination would yield large welfare gains. The social value of the patent system would also be larger if complemented by antitrust limits on licensing.

Item Type: Article
Official URL:
Additional Information: © 2021 The Authors
Divisions: Economics
Subjects: H Social Sciences > HD Industries. Land use. Labor
K Law > K Law (General)
Date Deposited: 15 Oct 2021 10:36
Last Modified: 11 Nov 2022 15:15

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics