共 9 条
- [2] Berger A. N., 1998, EUR J OPER RES, V98, P175
- [3] Bikker J., 2005, EXPLORATION COMPETIT
- [5] Coelli TJ, 1996, J APPL ECONOMET, V11, P77, DOI 10.1002/(SICI)1099-1255(199601)11:1<77::AID-JAE370>3.0.CO
- [6] 2-H
- [7] Cummins D., 2001, WORKING PAPER