Under a comonotonicity assumption between aggregate dividends and the market portfolio, the CCAPM formula becomes more tractable and more easily testable. In this paper, we provide theoretical justifications for such an assumption.

This paper constructs a general equilibrium model of the interaction between financial intermediaries and financial markets that sheds some light on the short-term volatility of real interest rates. The main findings of the paper are as follows. When financial intermediaries issue contingent...

When the markets are dynamically complete and without imperfections there are three equivalent approaches in order to price a given asset : the arbitrage approach through the existence of a risk-neutral density, the utility approach through a utility maximization program and the equilibrium...

In this paper we study the dynamic general equilibrium path of an economy and the associated optimal growth path in a two-sector overlapping generation model with a stock pollutant. A sector (power generation) is polluting, and the other (final good) is not. Pollution is regulated by tradable...

In this paper we eliminate the free disposal assumption in a general equilibrium model in which the production sector may exhibit increasing returns to scale or more general types of nonconvexities and where the firms follow general pricing rules. Under standard assumptions in this framework, we...

We consider the problem of valuing European options in a complete market but with incomplete data. Typically, when the underlying asset dynamics is not specified, the martingale probability measure is unknown. Given a consensus on the actual distribution of the underlying price at maturity, we...

We prove the non-emptiness of the core of an NTU game satisfying a condition of payoff-dependent balancedness, based on transfer rate mappings. We also define a new equilibrium condition on transfer rates and we prove the existence of core payoff vectors satisfying this condition. The additional...

It is shown that it is possible to construct a disequilibrium microeconomics in which agents react to the evidence of disequilibrium (inventories, nonnormal ratio of capacity utilization, etc.). In a one good model, we describe the set of fixed points In addition to normal equilibrium, two...

This paper reconsiders the theory of existence of efficient allocations and equilibria when consumption sets are unbounded below under the assumption that agents have incomplete preferences. Our model is motivated by an example in the theory of assets with short-selling where there is risk and...

The overlapping expectations and the collective absence of arbitrage conditions introduced in the economic literature to insure existence of Pareto optima and equilibria with short-selling when investors have a single belief about future returns, is reconsidered. Investors use measures of risk....