This study examined the relationship between educational achievement and ethnicity as related to enrollment patterns of Wisconsin high school and college students. The purpose of the study was to identify the points at which minority students leave the educational system. The data utilized for the study were the enrollment data for 1973-74 and 1974-75. Cohort-survival models of Wisconsin students moving through high school, from high school to the University of Wisconsin and through the university were used. Ethnic identification was the independent variable. The study had three major findings. Ethnic composition in the school district is itself related to attrition patterns. Minority high school graduates are as likely to attend the University of Wisconsin as are non-minority high school graduates. The flow of students through the university system may indicate higher attrition for some minority groups compared with non-minority students. The study concluded that without a change in the Milwaukee secondary school attrition pattern, minority groups will never be proportionately represented in the higher educational system of the state. Furthermore development of support programs for minority students in the university system might also have a significant affect upon college enrollments. (Author/JP)