Much work on innovation strategy assumes or theorizes that competition in innovation elicits duplication of research and that disclosure decreases such duplication. We validate this empirically using the American Inventors Protection Act (AIPA), three complementary identification strategies, and a new measure of blocked future patent applications. We show that AIPA—intended to reduce duplication, through default disclosure of patent applications 18 months after filing—reduced duplication in the U.S. and European patent systems. The blocking measure provides a clear and micro measure of technological competition that can be aggregated to facilitate the empirical investigation of innovation, firm strategy, and the positive and negative externalities of patenting. This paper was accepted by Joshua Gans, business strategy.
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Disclosure and Subsequent Innovation: Evidence from the Patent Depository Library Program
How important is access to patent documents for subsequent innovation? We examine the expansion of the USPTO Patent Library system after 1975. Patent libraries provided access to patents before the Internet. We find that after patent library opening, local patenting increases by 8–20 percent relative to similar regions. Additional analyses suggest that disclosure of technical information drives this effect: inventors increasingly take up ideas from outside their region, and the effect is strongest in technologies where patents are more informative. We thus provide evidence that disclosure plays an important role in cumulative innovation. (JEL D83, K11, O31, O34, R11)
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- Award ID(s):
- 1564368
- PAR ID:
- 10356567
- Date Published:
- Journal Name:
- American Economic Journal: Economic Policy
- Volume:
- 13
- Issue:
- 4
- ISSN:
- 1945-7731
- Page Range / eLocation ID:
- 239 to 270
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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