Committees are typically structured as incomplete networks of their members. Some do and others do not communicate with each other. This may either complicate or ease the identification of joint preferences and thus of collective decision making. Existing theories of group decision making either assume complete or unconnected networks. However, recent developments in network-based game theory are exploring the implications of group structures on decision making. Based on these approaches, we study the effect of different network structures on redistributive taxes in a laboratory experiment. We find that the effect of the communication structure depends on the distribution of earned endowments.
