This paper explores two broad questions on collaboration between individuals. First, we investigate what personal …-of-a-feather-flock-together" effects in collaboration can be costly …

types can be exploited to enhance cooperation by structuring the twice-played prisoners' dilemma to "start small," so that …

People respond to those who ask. Within the charitable fundraising community, the power of the ask represents the …

behavior more visible to the community the Principal can amplify reputational payoffs, thereby reducing free-riding at low cost …

, and in the community. While earlier studies have found important age patterns (often U-shaped) and social context effects … models with and without other control variables. The U-shape in age is found to be significantly flatter, and well-being in … couples, and for those who have lived for longer in their communities. A strong sense of community belonging is associated …

This paper characterizes the efficient sequential equilibrium when a government uses indirect control to exert its … to exert direct control by intervening with an endogenously determined intensity of force which is costly to both players …