主讲人Speaker:陈思宇 副教授 暨南大学

时间Date & Time:2025年4月9日（周三），下午15:00--16:30

地点Venue:粤海校区汇星楼565会议室

内容简介/ Abstract:

Concerns over the excessive use of mobile phones, especially among youths and young adults, are growing. We present, to our knowledge, the first estimates of both behavioral spillover and contextual peer effects, as well as the first comprehensive evidence of how own and peers’mobile app usage affects academic performance, physical health, and labor market outcomes. Our analysis leverages administrative data from a Chinese university of three cohorts of students over up to four years merged with mobile phone records, random roommate assignments, and a policy shock that affects peers’peers. App usage is contagious: a one s.d. increase in roommates’in-college app usage raises own app usage by 5.8% on average, with substantial heterogeneity across students. High app usage is detrimental to all outcomes we measure. A one s.d. increase in app usage reduces GPAs by 36.2% of a within-cohort-major s.d. and lowers wages by 2.3%. Roommates’app usage exerts both direct effects (e.g., noise and disruptions) and indirect effects (via behavioral spillovers) on GPAs and wages, resulting in a total negative impact of over half the size of the own usage effect. Extending China’s minors’game restriction of three hours per week to college students would boost their initial wages by 0.9%. Using high-frequency GPS data, we identify one underlying mechanism: high app usage crowds out time in study halls and increases late arrivals at and absences from lectures.

主讲人介绍/Biography of the speaker：

陈思宇，现任暨南大学经济与社会研究院副教授，院长助理，2019年获得新加坡国立大学经济学博士学位。研究领域为劳动经济学、环境经济学、金融、应用微观等，研究成果发表于Review of Economics and Statistics、Nature Mental Health, Journal of Environmental Economics and Management、Regional Science and Urban Economics、Environmental Research、《管理世界》《世界经济》等国内外经济学权威期刊。主持国家自然科学基金青年科学基金项目。获第六届广东省青年教师教学大赛一等奖，暨南大学优秀班主任等荣誉。

当天上午将开展学术交流活动，欢迎感兴趣的老师和同学参加！