Studying with higher ability peers increases student performance, yet we have little idea why. We exploit random assignment of students to classrooms and find positive peer effects on test scores. With very rich data on seventeen potential mechanisms, we then estimate how peer effects on...

We theorize peer awards’ effects on the volume and novelty of creative user-generated content (UGC) produced at online platform communities. We then test our hypotheses via a randomized field experiment on Reddit, wherein we randomly and anonymously assigned Reddit’s Gold Award to 905...

This paper documents that a shift from a selective to a comprehensive education system had implications for marriage market outcomes. By exploiting an education reform in Sweden, I show that comprehensive education reduced assortative mating both because children from poor backgrounds started to...