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Unobserved Heterogeneity in Regression Models: A Semiparametric Approach Based on Nonlinear Sieves

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  • Medeiros, Marcelo C
  • Burity, Priscilla
  • Assunção, Juliano

Abstract

This paper proposes a semiparametric approach to control for unobserved heterogeneity in linear regression models, based on an artificial neural network extremum estimator. We present a procedure to specify the model and use simulations to evaluate its finite sample properties in comparison to alternative methods. The simulations show that our approach is less sensitive to increases in the dimensionality and complexity of the problem. We also use the model to study convergence of per capita income across Brazilian municipalities.

Suggested Citation

  • Medeiros, Marcelo C & Burity, Priscilla & Assunção, Juliano, 2015. "Unobserved Heterogeneity in Regression Models: A Semiparametric Approach Based on Nonlinear Sieves," Brazilian Review of Econometrics, Sociedade Brasileira de Econometria - SBE, vol. 35(1), October.
    • Handle: RePEc:sbe:breart:v:35:y:2015:i:1:a:24305
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