Patents and R&D: Is There A Lag?
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This paper extends earlier work on the RID to patents relationship (Pakes-Griliches 1980, and Hausman, Hall, and Griliches,1984) to a larger but shorter panel of firms. The focus of the paper is on solving a number of econometric problems associated with the discreteness of the dependent variable
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美国国家经济研究局创建时间：
1984-09-01
