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Decomposing regional income inequality in China and Indonesia using two-stage nested Theil decomposition method

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Abstract.

The objective of this paper is to present an inequality decomposition method, the two-stage nested Theil decomposition method, which is an extension of the ordinary one-stage Theil decomposition method. The method is analogous to a two-stage nested design in the analysis of variance (ANOVA). It considers the three-level hierarchical structure of a country: region-province-district, and decomposes overall regional inequality, as measured by Theil indices based on district-level mean incomes, into three components: the between-region, between-province, and within-province inequality components. The within-province component is a weighted-average of within-province income inequalities for each province, while the between-province component is a weighted-average of between-province income inequalities within each region. The method uses a district as the underlying regional unit to measure regional income inequality, rather than a province, and thus can analyze the contribution of within-province inequalities as well as between-province and between-region inequalities to the overall regional income inequality in a coherent framework. This paper applies the two-stage nested Theil decomposition method to district-level income and population data in China and Indonesia and explores factors determining regional income inequality in China and Indonesia.

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Received: October 2000/Accepted: June 2002

The author is grateful to the Foundation of International Education (Kokusai Kyoiku Zaidan) and Japan Society for the Promotion of Science (Grant-in-Aid for Scientific Research No. 12630073) for their financial support, and to anonymous referees for helpful comments.

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Akita, T. Decomposing regional income inequality in China and Indonesia using two-stage nested Theil decomposition method. Ann Reg Sci 37, 55–77 (2003). https://doi.org/10.1007/s001680200107

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  • DOI: https://doi.org/10.1007/s001680200107

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