20周年院庆喜讯 | 我院李腾教授在经济学五大期刊_x0008__x0008_之一的The Quarterly Journal of Economics发表论文
我院李腾教授合作论文Digital Distractions with Peer Influence: The Impact of Mobile App Usage on Academic and Labor Market Outcomes近期被经济学五大期刊_x0008__x0008_之一The Quarterly Journal of Economics在线发表，李腾教授是论文的通讯作者。这是我院第一篇经济学Top 5论文，也是我院应用经济学学科建设的标志性成果。
合作者包括威斯康星大学麦迪逊分校贾攀乐教授、付超教授、暨南大学陈思宇副教授。李腾教授是我院2009级经济学专_x0008_业校友，陈思宇副教授是我院2010级经济学专_x0008_业校友。
The Quarterly Journal of Economics由牛津大学出版社代表哈佛大学经济系发行，创刊于1886年，是英语世界中最古老的经济学专_x0008_业期刊，也是全球历史最悠久的经济学期刊_x0008__x0008_之一。该刊覆盖经济学的所有领域，包括微观经济学、宏观经济学、劳动经济学、国际经济学、发展经济学、金融经济学以及行为经济学等。QJE以其极高的学术影响力和严格的审稿标准著称，2024年影响因子为12.7，年发文量约50篇左右，录用率极低。现任主编包括Robert J. Barro、Lawrence F. Katz等著名经济学家，被SCIE、SSCI等20余个国际数据库收录，对全球经济学研究和政策制定具有深远影响。
论文首次系统分析了手机过度使用对学业表现与早期职业结果的影响，并实证区分了情境同伴效应与行为同伴效应。研究发现，手机使用具有显著传染性：室友使用时间每增加一个标准差，会使个体自身使用时间上升5.8%。过度使用手机会导致学生平均绩点下降相当于同届同专_x0008_业 GPA 标准差的36.2%，工资水平降低2.3%，且室友的影响超过个体自身效应的一半。进一步数据分析发现，手机过度使用挤占了学习时间，并增加了迟到与缺课次数。
题目：Digital Distractions with Peer Influence: The Impact of Mobile App Usage on Academic and Labor Market Outcomes
摘要：Concerns about excessive mobile phone use among youth are mounting. We present estimates of both behavioral and contextual peer effects, along with comprehensive evidence on how students' own and their peers' app usage affect academic performance, physical health, and labor market outcomes. Our analysis draws on administrative data from a Chinese university covering three student cohorts over four years. We exploit random roommate assignments, differential exposure to a policy shock (gaming restrictions for minors), and differential exposure to a discrete event (the introduction of a blockbuster video game) for identification. App usage is contagious: a one s.d. increase in roommates' in-college app usage raises own usage by 5.8%. High app usage is harmful across all measured outcomes. 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 reduces a student's GPAs and wages through both disruptions and behavioral spillovers, generating a total negative effect that exceeds half the magnitude of the impact from the student's own app usage. Extending China's three-hour-per-week gaming restriction for minors to college students would boost their initial wages by 0.9%. High-frequency GPS and app usage data show that heavy app users spend less time in study halls, are more frequently late or absent from class, and get less sleep.
个人介绍：李腾，麻豆导航教授、学术部主任，中山大学高级金融研究院研究员，国家重大人才工程青年人才，中山大学“逸仙学者”。2013年获中山大学经济学本科学位，2017年获新加坡国立大学经济学博士学位。研究成果发表于The Quarterly Journal of Economics，Journal of Financial Economics，Journal of Urban Economics, Nature Mental Health和《经济研究》《管理世界》《经济学（季刊）》等期刊，并被Economist, Vox, VoxChina，Bloomberg, Medical Xpress, 腾讯、新浪财经、凤凰网和网易等国内外媒体和智库研究报道。
