Concerns about excessive mobile phone use among youth are mounting. We present estimates of 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 GPA 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.

The third challenge stems from the well-known difficulties in identifying peer effects in empirical settings, including the endogeneity of peer group formation and the “reflection problem” first articulated by Manski (1993)—an individual’s behavior both affects and is affected by their peers, making it difficult to establish causality. Disentangling the two classical types of peer effects, behavioral (endogenous) and contextual (exogenous) peer effects, is even more challenging (Manski 1993; Bramoullé, Djebbari, and Fortin 2020). In our context, the behavioral peer effects refer to how roommates’ action of app playing influences a student’s own app usage. Contextual peer effects, by contrast, capture how peers’ predetermined characteristics influence a student’s outcomes independent of their actual behaviors. In our setting, the key regressor capturing contextual peer effects is roommates’ precollege game usage, which may reflect traits such as motivation, attitudes toward academics, or established study habits.

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Lysol Crisp Linen Disinfecting Wipes - 80ct

Lysol Crisp Linen Disinfecting Wipes - 80ct

Regular price Rs. 450.00 INR
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EPA #777-114. Lysol Disinfecting Wipes can be used as a convenient way to clean and disinfect your household surfaces. Lysol is stronger than the competition (vs. leading competitor – based on lab results). Each pre-moistened disposable wipe kills germs (on surfaces when used as directed) wherever you use it. No bottles, no sponges, no mess. Kills Salmonella Enterica (Salmonella), Influenza A Virus (H1N1), Herpes Simplex Virus Type 1 and Respiratory Syncytial Virus on hard, non-porous surfaces in 4 minutes. Disinfects including: Escherichia coli, Staphylococcus aureus (Staph), Influenza H7N9 and Streptococcus Pyogenes (Strep) among others. Kills 99.9% of Viruses and Bacteria when used as directed. Removes allergens (Pet Dander, Dust Mite Debris and Pollen Particles). Effective disinfecting has never been easier. Lysol Disinfecting Wipes are also safe to use on your gadgets like Smartphones, Tablets & Remote Controls.

Packaging contains >30% recycled content.

Highlights

  • DISINFECTING WIPES KILLS 99.9% OF VIRUSES AND BACTERIA: Lysol Disinfecting Wipes are tested and proven to clean and kill 99.9% of viruses and bacteria, including 8 cold and flu viruses* (when used as directed).
  • KILLS COVID-19 VIRUS: Tested & proven to kill COVID-19 virus** (**Kills SARS-CoV-2 on hard, non-porous surfaces in 15 seconds), EPA Reg #777-114.
  • MULTI-PURPOSE CLEANING WIPES 3X STRONGER THAN A PAPER TOWEL: These disinfecting cleaning wipes are 3x stronger than a paper towel. Keep out of reach of children.
  • USE ON MULTIPLE SURFACES: Germs and messes occur on more than kitchen and bathroom surfaces; conveniently tackle any tough surface including remotes, tablets, and smartphones with these multi-surface cleaning wipes.
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