Patents and R & D at the firm level : a first report
Year of publication: |
1980
|
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Authors: | Pakes, Ariel ; Griliches, Zvi |
Published in: |
Economics letters. - Amsterdam [u.a.] : Elsevier, ISSN 0165-1765, ZDB-ID 717210-2. - Vol. 5.1980, 4, p. 377-381
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Subject: | Erfindungsschutz | Forschung | Forschungskosten | Vereinigte Staaten |
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