There is a wealth of research in psychology demonstrating that agents process information with the aid of categories. In this paper we study this phenomenon in two parts. First, we build a model of how experiences are sorted into categories and how categorization affects decision making. Second,...

We run a novel field experiment to link managers of African manufacturing firms. The experiment features exogenous link formation, exogenous seeding of information, and exogenous assignment to treatment and placebo. We study the impact of the experiment on firm business practices outside of the...

We examine friendships and study partnerships among university students over several years. At the aggregate level, connections increase over time, but homophily on gender and ethnicity is relatively constant across time, university residences, and different network layers. At the individual...

We conduct an interactive online experiment framed as an employment contract between employer and worker. Subjects from the US, India, and Africa are matched in pairs within and, in some cases, across countries. Employers make a one-period offer to a worker who can either decline or choose a...