Using a standard frictionless, continuous time, and continuous trading stochastic economy with heterogeneous beliefs, the purpose of this paper is to provide sufficient conditions for the existence of competitive equilibrium in an incomplete asset market. A new approach to proving existence is...

We show that debt is sustainable at a competitive equilibrium based solely on the reputation for repayment; that is, even without collateral or legal sanctions available to creditors. In an incomplete asset market, when the rate of interest falls recurrently below the rate of growth of the...

This is a leisurely introduction, in the vein of a piece in the history of science, to belated publication of my well-known paper on incomplete markets, Competitive Equilibrium with Incomplete Financial Markets

The classic Arrow-Debreu framework requires a very large number of specific securities to reach Pareto optimality. The present paper shows that financial intermediation can play an important role in maintaining a more parsimonious market framework while still obtaining Pareto optimality. In the...

When the asset market is incomplete, competitive equilibria are constrained suboptimal, and there is scope for Pareto improving interventions. Price regulation, which operates anonymously, on market variables, can be such a Pareto improving policy, even when the welfare effects of rationing are...

At arbitrary prices of commodities and assets, fix-price equilibria exist under weak assumptions: endowments need not satisfy an interiority condition, utility functions need only satisfy a very weak monotonicity requirement, and the asset return matrix allows for redundant assets. Prices of...

This paper studies the optimal design of fiscal policy when financial markets are incomplete at the aggregate and microeconomic level. The government trades a non-state contingent bond (liability) and cannot insure against the uncertainty in future tax revenues, while households are unable to...

This paper explores how market power of agents on the capital market affects economic growth and output fluctuations in an overlapping-generations model with endogenous capital accumulation. Agents interact strategically by anticipating how their savings affect the return on savings in...

We formalize the idea that the financial sector can be a source of non-fundamental risk. Households' desire to hedge against price volatility can generate price volatility in equilibrium, even absent fundamental risk. Fearing that asset prices may fall, risk-averse households demand safe assets...