Alternative approaches for econometric modeling of panel data using mixture distributions

Judex Hyppolite ()
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Judex Hyppolite: Monmouth University

Journal of Statistical Distributions and Applications, 2017, vol. 4, issue 1, 1-34

Abstract: Abstract The economic researcher is sometimes confronted with panel datasets that come from a population made of a finite number of subpopulations. Within each subpopulation the individuals may also be heterogenous according to some unobserved characteristics. A good understanding of the behavior of the observed individuals may then require the ability to identify the groups to which they belong and to study their behavior across groups and within groups. This may not be a complicated exercise when a group indicator variable is available in the dataset. However, such a variable may not be included in the dataset; and as a result, the econometrician is forced to work with the marginal distribution of the observed response variable, which takes the form of a mixture distribution. One can model a given response variable with a variety of mixture distributions. In this paper, I present several related mixture models. The most flexible one is an extension of the model by Kim et al. (2008) to the panel data setting. I have reviewed the estimation of some of these models by the Expectation-Maximization (EM) algorithm. The intent is to exploit the nice convergence properties of this algorithm when it is difficult to find good starting values for a Newton-type algorithm. I have also discussed how to compare these models and ultimately identify the one that provides the best fit to the data set under investigation. As an application I examine the investment behavior of U.S. manufacturing firms.

Keywords: Panel data; Mixture of distributions; Hidden Markov models; Heterogeneity (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1186/s40488-017-0066-3

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