The absence of simultaneous cycles is a sufficient condition for the existence of singleton cores. Acyclicity in the preferences of either side of the market is a minimal condition that guarantees the existence of singleton cores

Symmetric Nash equilibrium is a well-known refinement of Nash equilibrium in the study of bidding behavior of online advertisers on the sponsored search advertising marketplace. This solution concept, however, has major limitations. It allows for over-bidding and has uncompelling upper bounds....

We consider the problem where agents bargain over their shares of a perfectly divisible commodity. The aim of this paper is to identify the class of bargaining solutions induced by dominant strategy implementable allocation rules. To this end, we characterize the class of dominant strategy...

Nash (1950) proposes a bargaining theory. This paper proves that Nash’s theory is not about bargaining, but is the result of exchange. Exchange also requires bargaining, but exchange itself is not bargaining

The generalized second-price (GSP) mechanism is the most widely-used auction format in sponsored search markets. However, figuring out how to bid on GSP auctions presents major theoretical and computational challenges due to the complex nature of the auction format and the infinite number of...

We consider two-sided matching markets with couples. First, we extend a result by Klaus and Klijn (2005, Theorem 3.3) and show that for any weakly responsive couples market there always exists a "double stable" matching, i.e., a matching that is stable for the couples market and for any...

We give a mechanism fully implementing envy-free divisions such that: strategy spaces are symmetric, the set of Nash equilibria is a global attractor for the best-reply dynamics. As a byproduct, undesired mixed-strategy equilibria are weeded out by the adjustment process

In order to be able to devise successful strategies for destabilizing terrorist organizations it is vital to recognize and understand their structural properties. This paper deals with the optimal communication structure of terrorist organizations when considering the tradeoff between secrecy...

We provide natural mechanisms for the Nash implementation of the Nash bargaining solution if the set of possible payoff allocations is unknown to the planner. The need for two different mechanisms arises, because the case of three or more agents and that of two require separate treatment....