this study describes how minority enrollment probabilities respond to changes in admission policies from affirmative-action to merit-only programs and then to percentage plans when the demographic composition of the potential pool of applicants is also shifting. it takes advantage of admission policy changes that occurred in the state of texas with the hopwood and hb588 decisions and of a unique administrative dataset that includes applications, admissions, and enrollments for three public universities of different selectivity levels. the findings suggest that the elimination of affirmative action and the introduction of the top 10% plan had differential effects on minority enrollment probabilities as well as on application behavior depending on the selectivity level of the postsecondary institution. in particular, hopwood is related to shifts in minority enrollments from selective institutions to less selective ones as the cascading hypothesis predicts. and although the top 10% pla...