We present a model of endogenous network formation with absolute friction and heterogeneous agents. The individual payoffs from a given network are determined by the difference of an agent specific utility function that depends on the number of his/her direct links and the sum of his/her...

Many theories of consumer demand impose specific properties on the preference relations, e.g. convexity, monotonicity or homotheticity. Existing nonparametric tests which allow us to single out the preference relations that do not satisfy these properties are only valid in very specific...

The incorporation of small mutation rates has significantly improved the predictive capacity of evolutionary models. Bergin and Lipman [1996], however, demonstrate that this improvement depends entirely on the nature of the mutation process. We provide a constructive corroboration of their...

To test the joint hypothesis that players in a noncooperative game (allowing mixed strategies) maximize expected utilities and select a Nash equilibrium, it suffices to study the reaction of the revealed collective choice upon changes in the space of strategies available to the players. The...

We develop a general equilibrium model to analyse the impact of the international commodity prices on civil conflict. We focus on the specific labour market context of underdeveloped rural sub-Saharan African areas where highly valuable and easily appropriable natural resources constitute the...

We introduce an Absolute (Relative) Time-consistent Axiom of Revealed Preference which characterizes the consistency of a choice function with the property of absolute (relative) time-consistency and impatience. The axiom requires that the absolute (relative) time-consistent and impatient...

This note focuses on the use of utility monotonic perturbations as a means of modelling the mutation process in evolutionary models. We show that a game has a detailed balanced and utility monotonic perturbation if and only if it is an ordinal potential game. We also show that utility...

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We develop a directional measure of income mobility. This measure can be expresssed as a rank dependent mean of the individual mobilities in society and allows to give more weight to lower individual mobilities. The class includes the measures of directional mobility encountered in the...

We provide a revealed preference analysis of the transferable utility hypothesis, which is widely used in economic models. First, we establish revealed preference conditions that must be satisfied for observed group behavior to be consistent with Pareto efficiency under transferable utility....