This paper studies recursive exchange economies with short sales. Agents maximize discounted expected utility. The asset structure is general and includes real securities, infinite-lived stocks, options, and other derivatives. The main result shows the existence of a competitive equilibrium...

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...

We provide a geometric test of whether a general equilibrium incomplete markets (GEI) economy has Hart points---points at which the rank of the securities payoff matrix drops. Condition (H) says that, at each nonterminal node, there is an affine set (of appropriate dimension) that intersects all...

Purpose: The purpose of this paper is to analyze the efficiency loss due to incomplete financial markets when risk is induced by technological uncertainty. Design/methodology/approach: A worker-capitalist general equilibrium model is developed. It is assumed that future technical change is a...

We use supervised machine learning to approximate the expectations typically contained in the optimality conditions of an economic model in the spirit of the parameterized expectations algorithm (PEA) with stochastic simulation. When the set of state variables is generated by a stochastic...

Die Liberalisierung der globalen Finanzmärkte hat ihr Ziel verfehlt, für mehr Stabilität und Wirtschaftswachstum zu sorgen. Stattdessen folgt seit 30 Jahren eine Krise auf die andere. Jetzt werden etliche Bankenreformen diskutiert, um die Finanzmärkte krisensicherer zu machen. Dabei...