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Modelling consumer behaviour: a comparison between aids and the stone-geary models

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  • Edison Fred Henao Atehortúa

Abstract

This work responds to the question: Why are the Almost Ideal Demand System (AIDS) and its quadratic extension, the QUAIDS model better ways ofmodelling consumer behaviour than the StoneGeary' Models? Thus, the work shall deal with proposals of singleequation (or separated equations) and with systems ofequattons where the theory is more striking. The work starts by defining what is known as consumer behaviour. Secondly, it makes a presentation of the restrictions or properties that demand functions have to possess. Thirdly, tt makes a brief presentation of each model and its main chacterístics, limitations and empirical evidence of using each. In this paragraph, the essay illustrates how can changes in sorne exogenous vanables affect on the consumption ofparticular commodities with especial reference to the way in which different models can allow for the impact ofchanges in income. Finally sorne concluding remarks are made.

Suggested Citation

  • Edison Fred Henao Atehortúa, 1996. "Modelling consumer behaviour: a comparison between aids and the stone-geary models," Ensayos de Economía 9510, Universidad Nacional de Colombia Sede Medellín.
    • Handle: RePEc:col:000418:009510
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    File URL: http://www.revistas.unal.edu.co/index.php/ede/article/viewFile/23796/24472
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    1. Blundell, Richard & Pashardes, Panos & Weber, Guglielmo, 1993. "What Do We Learn About Consumer Demand Patterns from Micro Data?," American Economic Review, American Economic Association, vol. 83(3), pages 570-597, June.
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