How many members should groups consist of? This paper addresses this question in view of imperfect information and coordination behavior among the members. I show that the existence of the coordination motive dismisses Condorcet's (1785) suggestion and the nite optimal size of the group is...

Using a simple model of a coordination game, this paper explores how the information use of individuals affects an optimal committee size. Although enlarging the committee promotes information aggregation, it also stimulates the members’ coordination motive and distorts their voting behavior...