Giffen Behaviour and Asymmetric Substitutability
AbstractLet a consumer consume two goods, and let good 1 be a Giffen good. Then a wellknown necessary condition for such behaviour is that good 1 is an inferior good. This paper shows that an additional necessary for such behaviour is that good 1 is a gross substitute for good 2, and that good 2 is a gross complement to good 1 (strong asymmetric gross substitutability). It is argued that identifying asymmetric gross substitutability as an additional necessary condition gives better insight into Giffen behaviour, both on an analytical level and an intuitive level. In particular, the paper uses the concept of asymmetric gross substitutability to give a taxonomy of preferences, which includes preferences that are locally characterised by Giffen behaviour, and also uses this concept to introduce new decompositions of the effect of a change in own price on the demand for a good, different from those known in the literature.
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Bibliographic InfoPaper provided by Utrecht School of Economics in its series Working Papers with number 10-16.
Length: 25 pages
Date of creation: Sep 2010
Date of revision:
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This paper has been announced in the following NEP Reports:
- NEP-ALL-2010-10-02 (All new papers)
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Kris De Jaegher, 2008.
"Benchmark Two-Good Utility Functions,"
University of Manchester, vol. 76(1), pages 44-65, 01.
- Kris De Jaegher, 2009.
"Asymmetric Substitutability: Theory And Some Applications,"
Western Economic Association International, vol. 47(4), pages 838-855, October.
- K.J.M. De Jaegher, 2008. "Asymmetric substitutability: theory and some applications," Working Papers 08-02, Utrecht School of Economics.
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