We consider a pure exchange, general equilibrium model, with two periods and a finite number of states, commodities, numeraire assets, and households. Participation in the asset markets is restricted in a household specific manner, imposing upper bounds on the amounts of borrowing which can be...

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...

We consider a model with real assets and restricted participation described by household-specific price-dependent short selling constraints. We show existence of equilibria for all elements in an explicitly characterized large subset of the set of economies. Copyright Springer-Verlag Italia 2014

The article presents a historical review of the literature related to the empirical problem of excessive risk premium. The risk premium (the difference between the return on equities and risk-free rate) observed in financial markets cannot be reconciled with theoretical models of financial...

We consider the two-date model of a financial exchange economy (E,F), with agents’ portfolio restrictions either represented by finitely many linear inequality constraints or satisfying Hart’s (1974) Weak No Market Arbitrage condition. The economy (E,F) is shown to have the same consumption...

We characterize equilibria with endogenous debt constraints for a general equilibrium economy with limited commitment in which the only consequence of default is losing the ability to borrow in future periods. First, we show that equilibrium debt limits must satisfy a simple condition that...

School choice plans in many cities grant students higher priority for some (but not all) seats at their neighborhood schools. This paper demonstrates how the precedence order, i.e. the order in which different types of seats are filled by applicants, has quantitative effects on distributional...

When the trading process is characterized by search frictions, traders may be rationed so markets need not clear. We build a general equilibrium model with transferable utility where the uncertainty arising from rationing is incorporated in the definition of a commodity, in the spirit of the...

Centralized and coordinated school assignment systems are a growing part of recent education reforms. This paper estimates school demand using rank order lists submitted in New York City's high school assignment system launched in Fall 2003 to study the effects of coordinating admissions in a...

We study competitive equilibrium in sequential economies under limited commitment. Default induces permanent exclusion from financial markets and endogenously determined solvency constraints prevent debt repudiation. Our analysis shows that such an enforcement mechanism is essentially fragile,...