Empirical evidence of income dynamics across EU regions

Roberto Zelli and Maria Grazia Pittau

Journal of Applied Econometrics, 2006, vol. 21, issue 5, 605-628

Abstract: This paper analyses the distribution of purchasing power standardized per capita income across EU-12 regions between 1977 and 1996. Dispersion of incomes between regions is measured taking into account their population sizes. The cross-sectional distributions are initially described by weighted kernel density estimates, revealing a multimodal structure of the distributions, less evident over the period. This evidence is supported by a bootstrap test. To detect homogeneous groups of regions, the empirical distributions are approximated by a finite mixture of normal densities. The components of the mixture represent clusters of poor|rich regions, while the mixing proportions the allocation over the poor and the rich components. The number of components is assessed by a bootstrap LR test, and the goodness of fit by a kernel density-based test. Income mobility is modelled by the stochastic kernel, the continuous counterpart of the transition probability matrix. The main implication is a very slow process of catching up of the poorest regions with the richer ones and a process of shifting away of a small group of very rich regions. This evidence is reflected in the shape of the ergodic distribution, which is well fitted by a two-component mixture model. Copyright © 2006 John Wiley & Sons, Ltd.

Date: 2006
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DOI: 10.1002/jae.855

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