Partisan Grading
利用美国某精英大学所在县的选民登记记录识别教授党派，发现共和党教授给出的成绩分布更不平等，且黑人学生相对白人学生得分更低。
We study grading outcomes associated with professors in an elite university in the United States who were identified—using voter registration records from the county where the university is located—as either Republicans or Democrats. The evidence suggests that student grades are linked to the political orientation of professors. Relative to their Democratic colleagues, Republican professors are associated with a less egalitarian distribution of grades and with lower grades awarded to black students relative to whites.