一道SC

princess

Discrimination in wages (in predominantly male occupations over the predominantly female has) given rise to substantial differentials between the wages of housepainters and secretaries and between the wages of parking-lot attendants and library assistants.

括弧里的介词短语是不是用来修饰wages? 如果是的话，其中的over应该怎么解释呢？
如果要我改，我就改成
Discrimination between wages in predominantly male occupations and those in the predominantly female ones has given rise to…..     
嘿嘿，可惜没有这个答案