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Testing non-nested semiparametric models: An application to engel curves specification

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Author Info

  • Juan Mora López

    ()
    (Universidad de Alicante)

  • Miguel A. Delgado González

    (Universidad Carlos III de Madrid)

Abstract

This paper proposes a test statistic for discriminating between two partly non linear regression models whose parametric components are non-nested. The statistic has the form of a J-test based on a parameter which artificially nests the null and alternative hypotheses. We study in detail the realistic case where all regressors in the nonlinear part are discrete and then no smoothing is required on estimating the nonparametric components. We also consider the general case where continuous and discrete regressors are present. The performance of the test in finite samples is discussed in the context of some Monte Carlo experiments. The test is well motivated for specification testing of Engel curves. We provide an application using data from the 1980 Spanish Expenditure Survey.

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File URL: http://www.ivie.es/downloads/docs/wpasad/wpasad-1996-21.pdf
File Function: Fisrt version / Primera version, 1996
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Bibliographic Info

Paper provided by Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie) in its series Working Papers. Serie AD with number 1996-21.

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Length: 40 pages
Date of creation: Dec 1996
Date of revision:
Publication status: Published by Ivie
Handle: RePEc:ivi:wpasad:1996-21

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Keywords: Engel curves; non-nested models; semiparametric estimation;

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