We study envy-free allocations in a many-to-many matching model with contracts which agents on one side of the market (doctors) are endowed substitutable choice functions and other (hospitals) responsive preferences. Envy-freeness is weakening stability that allows blocking involving hospital vacant position doctor does not envy any doctors currently employs. show set has lattice structure. Fur...

This paper addresses the role of affect and emotions in shaping the behavior of responders in the ultimatum game. A huge amount of research shows that players do not behave in an economically rational way in the ultimatum game, and emotional mechanisms have been proposed as a possible explanation. In particular, feelings of fairness, anger and envy are likely candidates as affective determinant...

The two sides of envy, destructive and constructive, give rise to qualitatively different equilibria, depending on the economic, institutional, and cultural environment. If investment opportunities are scarce, inequality is high, property rights are poorly protected, and social comparisons are strong, society is likely to be in the “fear equilibrium,” in which better endowed agents restrain the...

We study envy-free mechanisms for assigning tasks to agents, where every task may take a different amount of time to perform by each agent, and the goal is to get all the tasks done as soon as possible (i.e., minimize the makespan). For indivisible tasks, we put forward an envy-free polynomial mechanism that approximates the minimal makespan to within a factor ofO(logm), wherem is the number of...

Within organizations, individuals both collaborate with peers in pursuit of common goals and compete with those same peers for rewards and promotions. Whether individuals perceive their peers in competitive or collaborative terms can fundamentally influence important organizational interactions and decisions. In this work, we document the prevalence of these labile relationships and we describe...

Envy-freeness and Pareto Efficiency are two major goals in welfare economics. The existence of an allocation that satisfies both conditions has been studied for a long time. Whether items indivisible or divisible, it is impossible to achieve envy-freeness ex post even the case people items. In contrast, this work, we prove that, any cardinal utility functions (including complementary utilities ...