Three essays on social network using field experiments

This thesis studies the role of social networks in influencing economic activities using three self-contained chapters. Chapter 1 examines the importance of social networks in promoting technology adoption. Chapter 2 explores the role of network structure in education spillovers. Chapter 3 studies the role of peer effects in promoting educational outcomes. Regarding all three studies, we provide both theoretical models and empirical evidence to support our arguments. And we show that social networks matter in influencing people’s decisions in economic activities.