共 10 条
[1]
BESEN S, 1986, R3453NSF RAND CORP R
[2]
CHOU CF, 1990, DO CONSUMERS ALWAYS
[3]
CHURCH J, 1991, 1091 FOERD I EC RES
[4]
CHURCH J, 1989, BU8920 WORK PAP
[5]
DIXIT AK, 1977, AM ECON REV, V67, P297
[6]
DUDEY M, 1990, AM ECON REV, V80, P1092
[9]
KATZ ML, 1985, AM ECON REV, V75, P424
[10]
SPENCE AM, 1976, REV ECON STUD, V43, P217