Averaging Income Distributions

William Griffiths (), Duangkamon Chotikapanich and D.S. Prasada Rao ()

Bulletin of Economic Research, 2005, vol. 57, issue 4, 347-367

Abstract: Various inequality and social welfare measures often depend heavily on the choice of a distribution of income. Picking a distribution that best fits the data involves throwing away information and does not allow for the fact that a wrong choice can be made. Instead, Bayesian model averaging utilizes a weighted average of the results from a number of income distributions, with each weight given by the probability that a distribution is ‘correct’. In this study, prior densities are placed on mean income, the mode of income and the Gini coefficient for Australian income units with one parent (1997–8). Then, using grouped sample data on incomes, posterior densities for the mean and mode of income and the Gini coefficient are derived for a variety of income distributions. The model‐averaged results from these income distributions are obtained.

Date: 2005
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https://doi.org/10.1111/j.0307-3378.2005.00226.x

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Working Paper: Averaging Income Distributions (2001)
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