Many believe that classroom interactions play an important role in students’ academic achievement, but there is little evidence on peer effects within subclassroom groups. We exploit random seat assignment in a Chinese middle school to estimate how the gender of neighboring students affects a student’s academic achievement. We find that being surrounded by five females rather than five males increases a female’s test scores by 0.2–0.3 standard deviations but has no significant effects on a male’s test scores. These results suggest a low-cost way to potentially improve performance within the world’s largest school system.

Fangwen Lu

Michael L. Anderson

Journal of Labor Economics

Since 1983, the Journal of Labor Economics has presented international research that examines issues affecting the economy as well as social and private behavior. The Journal publishes both theoretical and applied research results relating to the U.S. and international data. And its contributors investigate various aspects of labor economics, including supply and demand of labor services, personnel economics, distribution of income, unions and collective bargaining, applied and policy issues in labor economics, and labor markets and demographics.

Since its inception in 1983, the Journal of Labor Economics has published international research that explores issues affecting the economy as well as social and individual behavior. The journal publishes both theoretical and applied research findings related to U.S. and international data. Contributors investigate various aspects of labor economics, including the supply and demand for labor services, personnel economics, income distribution, unions and collective bargaining, applied and policy issues in labor economics, and labor markets and demographics.

《Journal of Labor Economics》自1983年以来，发表了国际研究，探讨影响经济以及社会和个人行为的问题。该期刊同时发布与美国及国际数据相关的理论和应用研究成果。其贡献者研究劳动经济学的各个方面，包括劳动服务的供需、人员经济学、收入分配、工会与集体谈判、劳动经济学的应用与政策问题，以及劳动市场和人口统计学。

Category	Quartile
经济学	1
经济学, 经济学	1
经济学, 劳动关系学	1

Peer Effects in Microenvironments: The Benefits of Homogeneous Classroom Groups

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Category	Quartile
INDUSTRIAL RELATIONS & LABOR	1