Trends in Income Distribution in Italy: a Non Parametric and a Semi-parametric Analysis
نویسندگان
چکیده
Using kernel density estimation and mixture models, household size-adjusted income distributions in Italy are cross-sectionally examined over the period 1987-2000. Nonparametric tests assess the shape time invariance and the presence of modes in the distributions. Evidence shows that income tend to cluster around more than one point, giving good reasons to model the shapes by a finite mixture density with an appropriate choice of components which represent homogeneous subpopulations. Effects of socio-demographic factors on the probability of households to belong to one of the component of the mixture are identified by a compositional data analysis.
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