Productivity and R and D at the Firm Level
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This paper analyzes the relationship between output, employment, and physical and R&D capital, for a sample of 133 large U.S. firms covering the years 1966 through 197. In the cross sectional dimension, there is a strong relationship between firm productivity and the level of its R&D invespments. In
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美国国家经济研究局创建时间：
1981-12-01
