Does Diversity Matter? Measuring the Impact of High School Diversity on Freshman GPA

Abstract

At the heart of arguments for affirmative action in university admissions are various claims about ethnic diversity. One assertion is that a diverse student body improves the quality of the educational experience: all students learn more. Further, a diverse educational experience better prepares students for the pluralistic society in which they will live. Previous studies examining these issues have been based on informal and survey methods. To better assess the impact of diversity we utilize a data set that allows us to measure student performance at the University of Illinois at Chicago (UIC) as a function of the diversity of a student's high school. Do students from diverse high schools do better in the ethnically diverse environment at UIC? After controlling for other factors that affect GPA, such as ACT, high school rank, and high school quality, we find significant diversity impacts. Depending on the diversity measure, a student from a very diverse high school has an expected first semester GPA that is a one‐fourth to one‐half point higher than a student from a nondiverse high school. The diversity impacts tend to be greater for students in the lower tail of the GPA distribution. There are also large gender differences with females helped most by diversity. Although the results represent outcomes at only one university, they nevertheless serve as a starting point for quantitatively assessing the impact of a diverse learning environment.