PT - JOURNAL ARTICLE AU - Brune, Lasse AU - Chyn, Eric AU - Kerwin, Jason TI - Peers and Motivation at Work AID - 10.3368/jhr.57.4.0919-10416R2 DP - 2020 Jun 10 TA - Journal of Human Resources PG - 0919-10416R2 4099 - http://jhr.uwpress.org/content/early/2020/06/05/jhr.57.4.0919-10416R2.short 4100 - http://jhr.uwpress.org/content/early/2020/06/05/jhr.57.4.0919-10416R2.full AB - This paper studies workplace peer effects by randomly varying work assignments at a tea estate in Malawi. We find that increasing mean peer ability by 10 percent raises productivity by 0.3 percent. This effect is driven by the responses of women. Neither production nor compensation externalities cause the effect because workers receive piece rates and do not work in teams. Additional analyses provide no support for learning or socialization as mechanisms. Instead, peer effects appear to operate through “motivation”: given the choice to be reassigned, most workers prefer working near high-ability co-workers because these peers motivate them to work harder.