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Abstract: Despite the growing interest in global inequality, assessing inequality trends is a major challenge because individual data on income or consumption is not often available. Nevertheless, the periodic release of cer-tain summary statistics of the income distribution has become increasingly common. Hence, groupeddata in form of income shares have been conventionally used to construct inequality trends based onlower bound approximations of inequality measures. This approach introduces two potential sourcesof measurement error: first, these estimates are constructed under the assumption of equality of incomeswithin income shares; second, the highest income earners are not included in the household surveysfrom which grouped data is obtained. In this paper, we propose to deploy a flexible parametric model,which addresses these two issues in order to obtain a reliable representation of the income distributionand accurate estimates of inequality measures. This methodology is used to estimate the recent evolutionof global interpersonal inequality from 1990 to 2015 and to examine the effect of survey under-coverageof top incomes on the level and direction of global inequality. Overall, we find that item non-response atthe top of the distribution substantially biases global inequality estimates, but, more importantly, itmight also affect the direction of the trends.
Autoría: Jordá V., Niño-Zarazúa M.,
Fuente: World Developmentt, 2019, 123, 104593
Editorial: Elsevier
Fecha de publicación: 01/11/2019
Nº de páginas: 15
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.worlddev.2019.06.017
ISSN: 1873-5991,0305-750X
Proyecto español: ECO2016-76203-C2-1-P
Url de la publicación: https://doi.org/10.1016/j.worlddev.2019.06.017
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