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Can a Representative Agent Model Represent a Heterogeneous Agent Economy?

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Author Info
Sungbae An (Singapore Management University)
Yongsung Chang (University of Rochester and Seoul National University)
Sun-Bin Kim (Department of Economics, Korea University)

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Abstract

Accounting for observed uctuations in aggregate employment, consumption, and real wage using optimality conditions of a representative household often requires preferences that are incompatible with economic priors (e.g., Mankiw, Rotemberg, and Summers, 1985). This discrepancy between the equilibrium model and the aggregate data is often viewed as evidence of the failure of labor-market clearing. We argue that such a conclusion is premature. We construct a model economy where all prices are exible and all markets clear at all times but household decisions are not readily aggregated because of incomplete capital markets and the indivisible nature of labor supply. We demonstrate that if we were to explain the model-generated aggregate time series using decisions of a "fictitious" stand-in household, such a household is likely to have a non-concave or unstable utility. Our analysis suggests that the representative agent model often fails to represent an equilibrium outcome of a heterogeneous agent economy.

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Publisher Info
Paper provided by Institute of Economic Research, Korea University in its series Discussion Paper Series with number 0714.

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Date of creation: 2007
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Handle: RePEc:iek:wpaper:0714

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Related research
Keywords: Representative agent model; Aggregation; Heterogeneity; Incomplete Markets; Indivisible Labor; GMM Estimation;

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Find related papers by JEL classification:
E24 - Macroeconomics and Monetary Economics - - Macroeconomics: Consumption, Saving, Production, Employment, and Investment - - - Employment; Unemployment; Wages; Intergenerational Income Distribution
E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
J21 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Labor Force and Employment, Size, and Structure
J22 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Time Allocation and Labor Supply

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This page was last updated on 2009-11-1.


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