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Chapter 18 - Ted O’Donoghue, Suzanne Scotchmer, and Jacques Thisse, “Patent Breadth, Patent Life, and the Pace of Technological Progress” (1998)

from Part II - Innovation Theory (I): Cumulative Innovation

Published online by Cambridge University Press:  12 October 2017

Stephen M. Maurer
Affiliation:
University of California, Berkeley
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Summary

In active investment climates where firms sequentially improve each other’s products, a patent can terminate either because it expires or because a noninfringing innovation displaces its product in the market. We define the length of time until one of these happens as the effective patent life, and show how it depends on patent breadth. We distinguish lagging breadth, which protects against imitation, from leading breadth, which protects against new improved products. We compare two types of patent policy with leading breadth: (1) patents are finite but very broad, so that the effective life of a patent coincides with its statutory life, and (2) patents are long but narrow, so that the effective life of a patent ends when a better product replaces it. The former policy improves the diffusion of new products, but the latter has lower R&D costs.

Type
Chapter
Information
On the Shoulders of Giants
Colleagues Remember Suzanne Scotchmer's Contributions to Economics
, pp. 85 - 120
Publisher: Cambridge University Press
Print publication year: 2017

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