VANISH regularization for generalized linear models

Oliver J. Rutz () and Garrett P. Sonnier
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Oliver J. Rutz: University of Washington
Garrett P. Sonnier: The University of Texas at Austin

Quantitative Marketing and Economics (QME), 2019, vol. 17, issue 4, No 3, 415-437

Abstract: Abstract Marketers increasingly face modeling situations where the number of independent variables is large and possibly approaching or exceeding the number of observations. In this setting, covariate selection and model estimation present significant challenges to usual methods of inference. These challenges are exacerbated when covariate interactions are of interest. Most extant regularization methods make no distinction between main and interaction terms in estimation. The linear VANISH model is an exception to these methods. The linear VANISH model is a regularization method for models with interaction terms that ensures proper model hierarchy by enforcing the heredity principle. We derive the generalized VANISH model for nonlinear responses, including duration, discrete choice, and count models widely used in marketing applications. In addition, we propose a VANISH model that allows to account for unobserved consumer heterogeneity via a mixture approach. In three empirical applications we demonstrate that our proposed model outperforms main effects models as well as other methods that include interaction terms.

Keywords: Non-linear marketing models; High-dimensional data; Interactions; regularization methods; Bayesian methods (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s11129-019-09216-4

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