共 9 条
[4]
市场结构对专利竞赛的影响[J]. 戴荣,高山行.预测. 2003(02)
[8]
Technological Progress and Change in Market Concentration in the U.S.1963—1977 .2 Mukhopadhyay,A.K. Southern Economic Journal . 1985
[9]
Competitive pressure:The effects on investments in product and process in-novation .2 Boone Jan. Journal of Economics . 2000