Survival conditions ensure the presence of consumptions that cost less than the total contingent income of agents in general equilibrium models. These conditions are generally fulfilled in competitive equilibrium. This paper shows the existence of equilibrium for incomplete-market economies...

Portfolio constraints often prevent financial derivatives from being synthetically created by primitive assets and thus, open a way for the 'redundant' assets to participate in expanding risk-sharing opportunities. They bring about peculiar portfolios, called 'link portfolios,' at an aggregate...

In this paper, I construct a model of an exchange economy in which bankruptcy arises in a manner similar to what we observe. This model is a more realistic representation of some markets in which intertemporal assets are traded. Using standard and natural assumptions, I show that every economy...

Uniqueness of equilibrium is a relatively unexplored issue in incomplete markets compared with complete markets. This work shows that one-fund separation is sufficient for the uniqueness of equilibrium in a special class of incomplete markets with two agents and two assets. Specifically, it...

A theory of general economic equilibrium with incomplete financial markets is developed with many new features, including currency-denominated prices which enable treatment of currency-based derivative instruments and collateralized contracts. Prices in such models with standard market structure...

The paper "Competitive equilibria of economies with a continuum of consumers and aggregate shocks" by J. Miao provides an in-depth analysis of dynamic models of the economy with a continuum of agents and aggregate productivity shocks. In Section 3 the existence of a sequential competitive...

In this paper, we give a proof of existence of sequential competitive equilibrium in Krusell-Smith type economies with different kinds of agents, taxes, unemployment insurance, and endogenous labor choice. We also provide a formal construction of a family of shock processes exhibiting...

This article provides a simple account of the effect of quality competition on the extent of sequential entry accommodation for a differentiated oligopoly market characterized by locational differentiation. The model is solved with consumers seeking a “love for quality” surplus utility while...

We propose a formal way to systematically study the differential effects of exogenous shocks in economic models with heterogeneous agents. Our setting applies to models that can be rephrased as "competition for market shares" in a broad sense. We show that even in presence of any number of...