Contests between groups are plagued by intra-group externalities (freeriding).Yet, costless incentive schemes that … entirely avoid free-riding within a group might not be desirable, neither individually nor socially. In contests among two … groups, a relatively weak (i.e., small or unproductive) group will optimally not implement them because they compound …

Decision theoretic models of group decision processes usually assume a given set of alternatives, about which the … decision has to take place. In realistic group decision situations, however, alternatives are often not specified a priori, but … are created during the group process from different components introduced by the group members. This paper develops …