Prague Economic Papers 2012, 21(1):69-82 | DOI: 10.18267/j.pep.411

On Multivariate Methods in Robust Econometrics

Jan Kalina
Institute of Computer Science, Academy of Sciences of the Czech Republic, Pod Vodárenskou věží 2, CZ - 182 07, Praha 8 (kalina@cs.cas.cz).

This work studies implicitly weighted robust statistical methods suitable for econometric problems. We study robust estimation mainly for the context of heteroscedasticity or high dimension, which are up-to-date topics of current econometrics. We describe a modification of linear regression resistant to heteroscedasticity and study its computational aspects. For a robust version of the instrumental variables estimator we propose an asymptotic test of heteroscedasticity. Further we describe robust statistical methods for dimension reduction and classification analysis. We propose the robust quadratic classification analysis based on a new minimum weighted covariance determinant (MWCD) estimator. In general the robust methods based on down-weighting less reliable observations are resistant to outlying values (outliers) and insensitive to the assumption of Gaussian normal distribution of the data. The methods are illustrated on econometric data examples.

Keywords: least weighted squares, heteroscedasticity, multivariate statistics, model selection, diagnostics, computational aspects
JEL classification: C13, C14, C51

Published: January 1, 2012  Show citation

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Kalina, J. (2012). On Multivariate Methods in Robust Econometrics. Prague Economic Papers21(1), 69-82. doi: 10.18267/j.pep.411
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