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Estimation of the parameters of a linear expenditure system (LES) demand function for a small African economy


  • Nganou, Jean-Pascal


The validity of the key behavioral parameters used in the calibration process of computable general equilibrium (CGE) models remains a debated issue in the CGE literature. CGE modelers prefer to borrow from the handful of estimates available in the literature rather than estimating these parameters empirically. The dearth of data is often mentioned as the major reason for compromises to the empirical basis for the parameters used in CGE models. While the empirical literature on demand elasticities based on household expenditure surveys has been relatively available for both developed and developing countries, it remains lacking for African countries. This paper uses a seemingly unrelated regressions method to estimate own-price and income elasticities, as well as Frisch parameters for households whose consumption behavior is described by a Linear Expenditure System (LES) demand function. All the parameters estimated are intended for use in a Lesotho CGE model. The estimation results are generally consistent with the theory predictions.

Suggested Citation

  • Nganou, Jean-Pascal, 2005. "Estimation of the parameters of a linear expenditure system (LES) demand function for a small African economy," MPRA Paper 31450, University Library of Munich, Germany.
  • Handle: RePEc:pra:mprapa:31450

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    References listed on IDEAS

    1. Creedy, John, 1998. "Measuring the Welfare Effects of Price Changes: A Convenient Parametric Approach," Australian Economic Papers, Wiley Blackwell, vol. 37(2), pages 137-151, June.
    2. John Freebairn & Bill Griffiths, 2006. "Introduction," The Economic Record, The Economic Society of Australia, vol. 82(s1), pages 1-1, September.
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    Cited by:

    1. Yalew, Amsalu W. & Hirte, Georg & Lotze-Campen, Hermann & Tscharaktschiew, Stefan, 2017. "General equilibrium effects of public adaptation in agriculture in LDCs: Evidence from Ethiopia," CEPIE Working Papers 11/17, Technische Universit├Ąt Dresden, Center of Public and International Economics (CEPIE).

    More about this item


    CGE; Demand System (LES); Seemingly Unrelated Regressions (SUR); Africa; Lesotho;

    JEL classification:

    • C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
    • C20 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - General


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