Expansion, Enrollment, and Inequality of Educational Opportunity

This article calls into question the view that educational expansion has a causal effect on class-based inequalities of educational opportunity. This view, the impetus for many studies, is flawed because the empirical literature is hampered by poor measures of expansion and because it rests on simplistic understandings of the causal structure that relates supply, demand, and inequality of educational opportunity (IEO). The literature arose as it did because the institutions that are actually expanding and allocating—schools, colleges and universities—are treated as black boxes in conventional macro-level theories of expansion. If the black box is opened, we see that educational institutions at once make decisions about expansion and allocation, thus undermining a simplistic model that has expansion affecting allocation. Drawing upon examples from college education in the United States, I argue that the field must develop new measures of educational expansion and supply in order to identify the true relationship between educational expansion and IEO.