The document summarizes research showing that affirmative action can negatively impact students who receive large admissions preferences, including those based on race. Specifically, these students tend to earn poor grades, have lower graduation rates, change out of difficult majors, self-segregate, and struggle on licensing exams. However, when matched students attend less selective schools where their academic credentials are closer to the average, their outcomes improve substantially. The research suggests affirmative action may unintentionally harm the very students it aims to help by placing them in environments where they are likely to struggle academically.