共 10 条
[7]
Excess Returns to R&D-Intensive Firms[J] . Dennis Chambers,Ross Jennings,Robert B. Thompson.Review of Accounting Studies . 2002 (2-3)
[8]
Industry Effects and Appropriability Measures in the Stock Market's Valuation of R&D and Patents[J] . Iain Cockburn,Zvi Griliches.The American Economic Review . 1988 (2)
[9]
On Patents, R & D, and the Stock Market Rate of Return[J] . Ariel Pakes.Journal of Political Economy . 1985 (2)
[10]
Industrial Research and Development, Intangible Capital Stocks, and Firm Profit Rates[J] . The Bell Journal of Economics . 1978 (2)