Interaction, Stereotypes, and Performance: Evidence from South Africa
利用南非一所大学随机分配室友的政策，研究发现跨种族互动减少了白人学生对黑人学生的负面刻板印象，增加了跨种族友谊，并提高了黑人学生的学业成绩（GPA、通过率、降低辍学率）。
We exploit a policy designed to randomly allocate roommates in a large South African university to investigate whether interracial interaction affects stereotypes, attitudes and performance. Using implicit association tests, we find that living with a roommate of a different race reduces White students' negative stereotypes towards Black students and increases interracial friendships. Interaction also affects academic outcomes: Black students improve their GPA, pass more exams and have lower dropout rates. This effect is not driven by roommate's ability.