Decomposing regional income inequality in China and Indonesia using two-stage nested Theil decomposition method
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. Copyright Springer-Verlag Berlin Heidelberg 2003
Volume (Year): 37 (2003)
Issue (Month): 1 (02)
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