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The Stata Journal
Volume 17 Number 2: pp. 490-502



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Rate decomposition for aggregate data using Das Gupta's method

Jinjing Li
National Centre for Social and Economic Modelling
Institute for Governance and Policy Analysis
University of Canberra
Bruce, Australia
jinjing.li@canberra.edu.au
Abstract.  Social, behavioral, and health scientists frequently decompose changes or differences in outcome variables into components of change and assess their relative importance. Many Stata commands facilitate this exercise using unit-level data, notably by applying the Blinder–Oaxaca approach. However, none of the comparable user-written commands decompose changes or differences in aggregate data despite their availability and the widespread use of corresponding decomposition techniques. In this article, I present the user-written command rdecompose, which decomposes aggregate or cross-classified data based on Das Gupta's (1993, Standardization and Decomposition of Rates: A User’s Manual, Volume 1) approach, and demonstrate its application in multiple settings. This command extends the original method by allowing multiple factors and flexible functional specifications.
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