We test a mechanism whereby groups are formed endogenously, through the use of voting. Once formed, groups play a public-goods game, where there are economies of scale: in two treatments the social value of an incremental contribution to the group account increases with the size of the group,...

We investigate the nature of continuous-time strategic interactions in public-goodsgames. In one set of treatments, four subjects make contribution decisions in continuous timewhile in another they make them only at discrete points of time. The effect of continuous timeis muted in public-goods...

We consider bargaining in a bipartite network of buyers and sellers, who can only trade with the limited number of people with whom they are connected. Such networks could arise due to proximity issues or restricted communication flows, as with information transmission of job openings, business...

Participants in experimental games typically can only choose actions, without making comments about other participants’ future actions. In sequential two-person games, we allow first movers to express a preference between responder choices. We find that responder behavior differs...

Do people care about intentions? Good intentions often do not produce good results when a person tries to do something nice for someone else. In this paper, we ask under what circumstances do people pay attention to outcomes and under what circumstances do they focus on intentions. While the...