共 38 条
[1]
*AM MAN CAR REV AS, 1992, DIR PREF PROV ORG IN
[2]
Baumol W.J., 1982, CONTESTABLE MARKETS
[3]
CARTER GM, 1990, J HLTH EC, V9, P143
[4]
CAVES D, 1980, AM ECON REV, V70, P442
[7]
COFFEY RM, 1988, 883428 DHHS PHS NAT