共 13 条
[1]
Caves R. E., 1980, INTRAINDUSTRY DIFFER
[2]
DAS BJ, THESIS U MISSISSIPPI
[6]
MILLS DE, 1985, AM ECON REV, V75, P758
[7]
Scherer, 1970, IND MARKET STRUCTURE
[8]
STIGLER G, 1963, CAPITAL RATE RETURN
[10]
*US DEP COMM, 1989, US IND OUTL 1988