A.An increase in the number of women entering the work force
B.A structural change in multioccupational public-sector unions
C.A more positive attitude on the part of women toward unions
D.An increase in the proportion of clerical workers that are women
E.An increase in the number of women in administrative positions
第3题
A.在经济分析基础上建立经济计量模型
B. 实验模型
C. 回归模型
D. 确定经济计量模型中待定参数
E. 利用已确定的模型对市场的未来作出预测
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