This paper models individual choices of social groups and the formation of group identity, and examines the conditions with which the group identity reinforces the productivity of individuals. A social group is defined as a network that provides with a market for interactions to its members....

It is wellknown that a group of individuals contributing to a joint production process with diminishing returns will tend, in equilibrium, to put in too little effort if shares of the output are exogenous, and will put in too much effort if their shares are proportional to their inputs. We...

Existence of monotone pure strategy equilibrium is established in the discriminatory and uniform S + a-th price (a in [0, 1]) auctions of S identical objects when bidders are risk-neutral with independent signals. The model requires discrete price / quantity grids and allows for...

Based on the critical assumption of strategic complementarity, this paper builds a general model to describe and solve the screening problem faced by the monopolist seller of a network good. By applying monotone comparative static tools, we demonstrate that the joint presence of asymmetric...

This paper presents a model of price screening for goods with network effects, by a monopoly seller, and by an entry-deterring monopolist. These products are used in variable quantities by heterogeneous customers, the magnitude of network effects is influenced by gross consumption, rather than...

We investigate the issue of implementation via individually rational ex-post budget-balanced Bayesian mechanisms. We demonstrate that all social choice rules that generate a nonnegative ex-ante surplus, including ex-post efficient ones, can generically be implemented via such mechanisms. The...

The standard model of a Bayesian game used in most applications assumes that players' beliefs are derived from a common knowledge prior on preference parameters. I analyze the robustness of equilibria of such games to perturbations in the information structure. In a type space environment...

In a typical corporate hierarchy, the manager is delegated the authority to make decisions that set directions for the organization, employ subordinates and contract with external suppliers. This paper explains when such delegation of authority can be optimal, using a model of a firm with three...

We develop a model of consulting (advising) where the role of the consultant is that she can reveal signals to her client which refine the client’s original private estimate of the profitability of a project. Importantly, only the client can observe or evaluate these signals...