Alternative hypotheses that explain the differences in the rate at whi
ch male and female workers are promoted to higher job levels are empir
ically tested. It is found that women are less frequently in jobs that
offer promotion possibilities than men. However, given that women are
in jobs that offer promotion opportunities, they are not less likely
to be promoted to another job within the firm. That women have jobs th
at offer promotion less frequently than men is due to differences in t
reatment rather than differences in characteristics.