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Separation-Resistant and Bias-Reduced Logistic Regression: STATISTICA Macro

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  • Fijorek, Kamil
  • Sokolowski, Andrzej

Abstract

Logistic regression is one of the most popular techniques used to describe the relationship between a binary dependent variable and a set of independent variables. However, the application of logistic regression to small data sets is often hindered by the complete or quasicomplete separation. Under the separation scenario, results obtained via maximum likelihood should not be trusted, since at least one parameter estimate diverges to infinity. Firth's approach to logistic regression is a theoretically sound procedure, which is guaranteed to arrive at finite estimates even in a separation case. Firth's procedure was also proved to significantly reduce the small sample bias of maximum likelihood estimates. The main goal of the paper is to introduce the STATISTICA macro, which performs Firth-type logistic regression.

Suggested Citation

  • Fijorek, Kamil & Sokolowski, Andrzej, 2012. "Separation-Resistant and Bias-Reduced Logistic Regression: STATISTICA Macro," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 47(c02).
  • Handle: RePEc:jss:jstsof:v:047:c02
    DOI: http://hdl.handle.net/10.18637/jss.v047.c02
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    References listed on IDEAS

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    1. Christmann, Andreas & Rousseeuw, Peter J., 1999. "Measuring overlap in logistic regression," Technical Reports 1999,25, Technische Universität Dortmund, Sonderforschungsbereich 475: Komplexitätsreduktion in multivariaten Datenstrukturen.
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    Cited by:

    1. Barrera, Carlos, 2014. "La relación entre los ciclos discretos en la inflación y el crecimiento: Perú 1993 - 2012," Working Papers 2014-024, Banco Central de Reserva del Perú.
    2. Bieszk-Stolorz Beata & Markowicz Iwona, 2014. "Economical Activity Of The Polish Population," Folia Oeconomica Stetinensia, Sciendo, vol. 14(2), pages 198-210, December.

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