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First published online September 1, 2012

Easy Demand-System Estimation with Quaids

Abstract

Previously, to fit an almost-ideal demand system in Stata, one would have to use the nlsur command and write a function evaluator program as described in [R] nlsur and Poi (2008, Stata Journal 8: 554–556). In this article, I introduce the command quaids, which obviates the need for any programming by the user. The command fits Deaton and Muellbauer's (1980b, American Economic Review 70: 312–326) original almost-ideal demand-system model as well as Banks, Blundell, and Lewbel's (1997, Review of Economics and Statistics 79: 527–539) quadratic variant. Demographic variables can also be included in the model. Postestimation tools calculate expenditure and price elasticities.

6 References

Banks J., Blundell R., and Lewbel A. 1997. Quadratic Engel curves and consumer demand. Review of Economics and Statistics 79: 527–539.
Blacklow P., Nicholas A., and Ray R. 2010. Demographic demand systems with application to equivalence scales estimation and inequality analysis: The Australian evidence. Australian Economic Papers 49: 161–179.
Deaton A. S., and Muellbauer J. 1980a. Economics and Consumer Behavior. Cambridge: Cambridge University Press.
Deaton A. S., and Muellbauer J. 1980b. An almost ideal demand system. American Economic Review 70: 312–326.
Mas-Colell A., Whinston M. D., and Green J. R. 1995. Microeconomic Theory. New York: Oxford University Press.
Poi B. P. 2002a. Dairy policy and consumer welfare. In Three Essays in Applied Econometrics, Chapter II, Doctoral thesis. Department of Economics, University of Michigan.
Poi B. P. 2002b. From the help desk: Demand system estimation. Stata Journal 2: 403–410.
Poi B. P. 2008. Demand-system estimation: Update. Stata Journal 8: 554–556.
Pollak R. A., and Wales T. J. 1981. Demographic variables in demand analysis. Econometrica 49: 1533–1551.
Ray R. 1983. Measuring the costs of children: An alternative approach. Journal of Public Economics 22: 89–102.

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Article first published online: September 1, 2012
Issue published: September 2012

Keywords

  1. st0268
  2. quaids
  3. almost-ideal demand system

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© 2012 StataCorp LLC.
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Brian P. Poi

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