We survey the literature on social networks by putting together the economics, sociological and physics … network formation. While the physics/applied mathematics approach is capable of reproducing most observed networks, it does … not explain why they emerge. On the contrary, the economics approach is very precise in explaining why networks emerge but …

Trust and participation in social networks are inherently interrelated. We make use of India's demonetization policy …, an unexpected and unforeseeable exogenous variation, to causally identify the effect of social networks in determining …