countries is self-enforcing. It is shown that there always exists a rather small stable tax coalition. For some subset of the … parameter space the grand coalition may be stable as well, even if the total number of countries is large. The small stable … coalition is not very effective in mitigating the inefficiency of the non-cooperative Nash equilibrium. The ineffectiveness is …

on the one hand and the core property of an allocation on the other. In particular we show that it is an inhomogeneous … distribution of cost shares that motivates some coalition of agents to separate and to block an initially given Pareto optimal … allocation which can be interpreted as the outcome of a negotiation process when all agents form a grand coalition …

The ex ante incentive compatible core of an exchange economy with private information is the (standard) core of a … incentive compatible core can be empty, even if utility functions are quasi-linear. If, in addition to quasi-linearity, further … assumptions are made (like independent private values), the non-emptiness of the core follows nevertheless from d’Aspremont and …

scale such games are quite tractable in analysis, computation, and realization. A core imputation comes in terms of …

) coalitional equilibrium, describe a (cooperative) partition form game. A coalition is core-stable if the core of a suitable …We propose a semi-cooperative game theoretic approach to check whether a given coalition is stable in a Bayesian game …