共 76 条
- [72] Wadhwa A, 2006, ACAD MANAGE J, V49, P819, DOI 10.2307/20159800
- [73] Wooldridge J.M., 1997, Handbook of Applied Econometrics, Volume II: Microeconometrics, VII
- [74] Wooldridge J. M., 2001, ECONOMETRIC ANAL CRO
- [75] Zucker LG, 1998, AM ECON REV, V88, P290