We study marriage problems where two groups of agents match to each other and probabilistic assignments are possible. When only ordinal preferences are observable, an extensively studied efficiency notion is stochastic dominance efficiency (sd-efficiency). First, we provide a characterization of...

We consider the allocation of a finite number of indivisible objects to the same number of agents according to an exogenously given queue. We assume that the agents collaborate in order to achieve an efficient outcome for society. We allow for side-payments and provide a method for obtaining...

Two new notions of stability of coalitions, based on the idea of exclusion or integration of players depending on how they affect allocations, are introduced for cooperative transferable utility games. The first one, called internal stability, requires that no coalition member would find that...

We delineate the various ways in which rights to environmental and other resources can be assigned to individuals or groups. We then examine models of individual and group interactions, drawing out their implications for the ways in which resources will be utilized and managed under various...

A competitive market mechanism is a prominent example of a nonbinary social choice rule, typically defined for a special class of economic environments in which each social state is an economic allocation of private goods, and individuals’ preferences concern only their own personal...

Substantial evidence suggests that group diversity can generate a multiplier effect that significantly affects the public good produced in collective action. In this paper, we examine how such a multiplier effect impacts group formation or the matching of diverse agents. Our model shows that...

This paper builds a bridge between certain of the most basic principles of economics and those of evolutionary biology. It begins by extending Ronald Coase’s “The Nature of the Firm” to an investigation of how, as their environment evolves, species achieve adaptive efficiency by...

The ibiCash Protocol serves as a mechanism for encapsulating the time value of forests within a currency made up of units which represent the intangible value of 1 hectare of standing forest for the period of a single day in each of the world's ecoregions. At the end of each day, the system...

Monetary markets serve as established resource allocation mechanisms, typically achieving efficient solutions with limited information. However, they are susceptible to market failures, particularly under the presence of public goods, externalities, or inequality of economic power. Moreover, in...

Car owners are liable for property damage inflicted on other motorists. In most countries such liability must be insured by law. That law may favor expensive or heavy vehicles, prone to suffer or inflict large losses. This paper explores links between liability rules and vehicle choice. It...