The Role of the Hamiltonian in Dynamic Price Index Theory
This paper is an attempt to investigate the cost-of-living index problem in a general equilibrium multi-sector growth model. Instead of using the utility function as a compensation criterion as Konüs’ (1924) did in his original contribution, we take advantage of the current-value Hamiltonian in constructing our dynamic price index. Since the Hamiltonian is a constancy-equivalent of future utilities (Weitzman, 1976), the dynamic price index is defined in terms of the minimum expenditure that, under alternative prices, would support the constancy-equivalent-utility level in the future. We show that, when properly deflated by the dynamic price index, the real comprehensive net national product becomes an ideal measure for dynamic welfare comparisons. For some special cases, we show that the dynamic price index reduces to the simple static index.
|Date of creation:||15 Feb 2004|
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- Pollak, Robert A, 1975. "Subindexes in the Cost of Living Index," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 16(1), pages 135-50, February.
- Gillingham, Robert, 1983. "Measuring the Cost of Shelter for Homeowners: Theoretical and Empirical Considerations," The Review of Economics and Statistics, MIT Press, vol. 65(2), pages 254-65, May.
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- H. S. Houthakker, 1952. "Compensated Changes in Quantities and Qualities Consumed," Review of Economic Studies, Oxford University Press, vol. 19(3), pages 155-164.
- Weitzman, Martin L, 2001. " A Contribution to the Theory of Welfare Accounting," Scandinavian Journal of Economics, Wiley Blackwell, vol. 103(1), pages 1-23, March.
- Goodhart, Charles, 2001. "What Weight Should Be Given to Asset Prices in the Measurement of Inflation?," Economic Journal, Royal Economic Society, vol. 111(472), pages F335-56, June.
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