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R&D depreciation, stocks, user costs and productivity growth for US R&D intensive industries
(2006)
This paper estimates R&D depreciation rates for U.S. R&D intensive industries. R&D annually depreciates at
The effects of public infrastructure and R&D capital on the cost structure and performance of US manufacturing industries
(1994)
In this paper we examine the effects of publicly financed infrastructure and R&D capitals on the cost structure and productivity performance of twelve two-digit US manufacturing industries. The results suggest that there ...