Committees improve decisions by pooling independent information of members, but promote manipulation, obfuscation, and exaggeration of private information when members have conflicting preferences. When members' preferences differ, the report submitted by any individual can not allow perfect...

A committee decides by unanimity whether to accept the current alternative, or to continue costly search. Each alternative is described by a vector of distinct attributes, and each committee member can privately assess the quality of one attribute (her "speciality"). Preferences are...

We introduce a game theory model of individual decisions to cooperate by contributing personal resources to group decisions versus by free-riding on the contributions of other members. In contrast to most public-goods games that assume group returns are linear in individual contributions, the...

This paper describes a simulation study of decision-making. It is based on a model of social influence in small, task-oriented, groups. A process model of dyadic social influence is built on top of a dynamic model of status and task participation that describes the emergence of a stable power...

Individual preferences can vary significantly by the mode in which they are elicited. Thus, the seemingly benign procedural issue of elicitation mode (i.e., choice, buying price, rating, matching) could have a profound effect on group decisions, although elicitation mode has not been much...

It is both important and challenging to gain influence within geographically diverse teams. We argue that the emotions team members experience in their initial team meetings moderate the effect of geographical dissimilarity on their perceived influence on team decisions over time. Specifically,...

Group decision-making in organizations often occurs in the context of influence relationships. We develop a theory anchored in a computational model to analyze the conditions under which social influence structures aid or hurt information aggregation. We find that a group is most likely to...