共 75 条
- [33] Flaig G., 1994, Empirical economics, V19, P55, DOI DOI 10.1007/BF01205728
- [35] Testing hypotheses about interaction terms in nonlinear models [J]. ECONOMICS LETTERS, 2010, 107 (02) : 291 - 296
- [36] The financing of research and development [J]. OXFORD REVIEW OF ECONOMIC POLICY, 2002, 18 (01) : 35 - 51
- [37] Heckman J.J., 1981, The Incidental Parameters Problem and the Problem of Initial Conditions in Estimating a Discrete Time-Discrete Data Stochastic Process
- [38] Heckman J.J., 1981, STUDIES LABOUR MARKE
- [39] The market for corporate control and firm innovation [J]. ACADEMY OF MANAGEMENT JOURNAL, 1996, 39 (05) : 1084 - 1119
- [40] HITT MA, 1990, STRATEGIC MANAGE J, V11, P29