Ambiguity aversion and the absence of indexed debt

Sujoy Mukerji and Jean-Marc Tallon

A chapter in Essays in Dynamic General Equilibrium Theory, 2005, pp 143-179 from Springer

Abstract: Summary Following the seminal works of Schmeidler (1989), Gilboa and Schmeidler (1989), roughly put, an agent’s subjective beliefs are said to be ambiguous if the beliefs may not be represented by a unique probability distribution, in the standard Bayesian fashion, but instead by a set of probabilities. An ambiguity averse decision maker evaluates an act by the minimum expected value that may be associated with it. In spite of wide and long-standing support among economists for indexation of loan contracts there has been relatively little use of indexation, except in situations of extremely high inflation. The object of this paper is to provide a (theoretical) explanation for this puzzling phenomenon based on the hypothesis that economic agents are ambiguity averse. The present paper considers a general equilibrium model based on (Magill and Quinzii, 1997), with ambiguity averse agents, where both nominal and indexed bond contracts are available for trade and all relevant prices are determined endogenously. We obtain conditions which prompt an endogenous cessation of trade in indexed bonds: i.e., conditions under which there is no trade in indexed bonds in any equilibrium; only nominal bonds are traded. We argue that the obtained conditions mirror the known stylized facts about trade in indexed financial contracts.

Keywords: Money Supply; Ambiguity Aversion; Idiosyncratic Risk; Monetary Shock; Wage Indexation (search for similar items in EconPapers)
Date: 2005
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Journal Article: Ambiguity aversion and the absence of indexed debt (2004)
Working Paper: Ambiguity aversion and the absence of indexed debt (2004)
Working Paper: Ambiguity aversion and the absence of indexed debt (2004)
Working Paper: Ambiguity Aversion and the Absence of Indexed Debt (2000)
Working Paper: Ambiguity Aversion and the Absence of Indexed Debt (2000)
Working Paper: Ambiguity Aversion and the Absence of Indexed Debt (2000)
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DOI: 10.1007/3-540-27192-9_7

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