 A social‐psychological reconstruction of Amartya Sen’s measures of inequality and social welfareOded Stark and Wiktor Budzinski Kyklos, 2021, vol. 74, issue 4, 552-566 Abstract: The Gini coefficient features prominently in Amartya Sen’s 1973 and 1997 seminal work on income inequality and social welfare. We construct the Gini coefficient from social‐psychological building blocks, reformulating it as a ratio between a measure of social stress and aggregate income. We determine when as a consequence of an income gain by an individual, an increase in the social stress measure dominates a concurrent increase in the aggregate income, such that the magnitude of the Gini coefficient increases. By integrating our approach to the construction of the Gini coefficient with Sen’s social welfare function, we are able to endow the function with a social‐psychological underpinning, showing that this function, too, is a composite of a measure of social stress and aggregate income. We reveal a dual role played by aggregate income as a booster of social welfare in Sen’s social welfare function. Quite surprisingly, we find that a marginal increase of income for any individual, regardless of the position of the individual in the hierarchy of incomes, improves welfare as measured by Sen’s social welfare function. Date: 2021 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:bla:kyklos:v:74:y:2021:i:4:p:552-566 Ordering information: This journal article can be ordered from Access Statistics for this article Kyklos is currently edited by Rene L. Frey More articles in Kyklos from Wiley Blackwell |
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