In this paper we introduce communication into intergroup ultimatum bargaining in a lab. The responder groups vote whether to accept the proposals with unanimity required either for acceptance or for rejection. In contrast with the no-communication results reported in our previous study...

This paper reports results of an experimental study of uniform and discriminatory auctions of multiple objects in an environment of publicly known common values. We find that the bidding behavior in the uniform case exhibits two clear regularities: agents consistently play weakly dominated...