Abstract: | A worker's occupation and industry position in the economy primarily determine gender differences in union membership. However, the data reveal that these economic structural factors are not alone responsible. A specific strategy for rethinking the problem examines bargaining power; skill has been identified as a central factor in worker power. Feminists maintain that gender mediates manual skill's effect on union membership. Logistic regression techniques that test for gender interaction effects support the feminist perspective. Manual skill produces lower rates of union membership for women than men with comparable skills. |