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Chapter 7 EASI Made Easier

In: Quantifying Consumer Preferences

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  • Krishna Pendakur

Abstract

Lewbel and Pendakur (2009) developed the idea of implicit Marshallian demands. Implicit Marshallian demand systems allow the incorporation of both unobserved preference heterogeneity and complex Engel curves into consumer demand analysis, circumventing the standard problems associated with combining rationality with either unobserved heterogeneity or high rank in demand (or both). They also developed the exact affine Stone index (EASI) implicit Marshallian demand system wherein much of the demand system is linearised and thus relatively easy to implement and estimate. This chapter offers a less technical introduction to implicit Marshallian demands in general and to the EASI demand system in particular. I show how to implement the EASI demand system, paying special attention to tricks that allow the investigator to further simplify the problem without sacrificing too much in terms of model flexibility. STATA code to implement the simplified models is included throughout the text and in an appendix.

Suggested Citation

  • Krishna Pendakur, 2009. "Chapter 7 EASI Made Easier," Contributions to Economic Analysis, in: Quantifying Consumer Preferences, pages 179-206, Emerald Group Publishing Limited.
    • Handle: RePEc:eme:ceazzz:s0573-8555(2009)0000288010
    DOI: 10.1108/S0573-8555(2009)0000288010
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    consumer demand analysis;

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