“…We adopt Cornelissen et al (2017) estimation approach to assess peer effects in Brazil, and we further allow same-gender and opposite-gender peers to exert different influences on workers' productivity. Many prior studies of peer effects are based on laboratory experiments 4 or on real-world data from specific occupations such as cashiers (Mas and Moretti, 2009), farm workers (Bandiera et al, 2005(Bandiera et al, , 2010Brune et al, 2022), call center workers (Lindquist et al, 2015), or sportsmen (Guryan et al, 2009). None of these studies, however, distinguish between within-gender and cross-gender peer effects.…”