共 5 条
[3]
A model for technical inefficiency effects in a stochastic frontier production function for panel data[J] . G. E. Battese,T. J. Coelli.Empirical Economics . 1995 (2)
[4]
R & D Capital, Rate of Return on R & D Investment and Spillover of R & D in Japanese Manufacturing Industries[J] . The Review of Economics and Statistics . 1989 (4)
[5]
R & D and the Productivity Slowdown[J] . Zvi Griliches.The American Economic Review . 1980 (2)