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Unexploited Connections Between Intra- and Inter-temporal Allocation

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  • Crossley, T.F.
  • Low, H.W.

Abstract

This paper shows that a power utility specification of preferences over total expenditure (ie. CRRA preferences) implies that intratemporal demands are in the PIGL/PIGLOG class. This class generates (at most) rank two demand systems and we can test the validity of power utility on cross-section data. Further, if we maintain the assumption of power utility, and within period preferences are not homothetic, then the intertemporal preference parameter is identified by the curvature of Engel curves. Under the power utility assumption, neither Euler equation estimation nor structural consumption function estimation is necessary to identify the power parameter. In our empirical work, we use demand data to estimate the power utility parameter and to test the assumption of the power utility representation. We .nd estimates of the power parameter larger than obtained from Euler equation estimation, but we reject the power specification of within period utility.

Suggested Citation

  • Crossley, T.F. & Low, H.W., 2005. "Unexploited Connections Between Intra- and Inter-temporal Allocation," Cambridge Working Papers in Economics 0537, Faculty of Economics, University of Cambridge.
    • Handle: RePEc:cam:camdae:0537
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    More about this item

    Keywords

    elasticity of intertemporal substitution; Euler equation estimation; demand systems;

    JEL classification:

    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • D12 - Microeconomics - - Household Behavior - - - Consumer Economics: Empirical Analysis

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