Equilibrium R&D and the patent-R&D ratio : US evidence
Year of publication: |
1993
|
---|---|
Authors: | Kortum, Samuel |
Published in: |
The American economic review. - Nashville, Tenn. : American Economic Assoc., ISSN 0002-8282, ZDB-ID 203590-X. - Vol. 83.1993, 2, p. 450-457
|
Subject: | Patent | Industrieforschung | Industrial research | USA | United States | 1957-1989 |
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