I study a model of group identification in which individuals' opinions as to the membership of a group are aggregated to form a list of group members. Potential aggregation rules are studied through the axiomatic approach. I introduce two axioms, meet separability and join separability, each of...

I study a 2-bidder infinitely repeated IPV first-price auction without transfers, communication, or public randomization, where each bidderʼs valuation can assume, in each of the (statistically independent) stage games, one of three possible values. Under certain distributional assumptions, the...

I study a symmetric 2-bidder IPV first-price auction prior to which one bidder can offer his rival a bribe in exchange for the latterʼs abstention. I focus on pure and undominated strategies, and on continuous monotonic equilibria—equilibria in which the bribing function is continuous and...