Journal of productivity analysis. 2003;19(1):33-58. doi: 10.1023/a:1021818019626 Q21.82025

Building the Knowledge Stock: Lags, Depreciation, and Uncertainty in R&D Investment and Link with Productivity Growth

构建知识存量：研发投资的滞后、折旧和不确定性及其与生产率增长的联系

DOI: 10.1023/a:1021818019626

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