共 6 条
[1]
BORTS GH, J POLITICAL EC, V62
[2]
JOHNSTON J, REV EC STATISTICS, V40
[3]
KENDALL MG, 1946, ADV THEORY STATISTIC, P237
[4]
MEYER JR, AM EC REV PAPERS P, V47, P209
[5]
Smith Caleb, 1955, BUSINESS CONCENTRATI
[6]
SNEDECOR GW, 1946, STAT METHODS, P318