From "Sex, Race, and Ethnic Inequality in the United States

Essay

From "Sex, Race, and Ethnic Inequality in the United States Workplaces" by Barbara F. Reskin and Irene Padavic
Reskin and Padavic discuss trends in:
A) occupational distribution, and
B) income attainment, by race and sex in the American workplace. They depict an opportunity structure that continues to disadvantage others than white males, although the disadvantage is probably less in recent decades than before. They emphasize the role of occupational segregation as causally important for trends and place it within class "suppy-" and "structural/demand-" side dynamics that generate inequities.
-What do the authors mean by "hierarchical segregation"? Provide examples of it.