NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Decomposition Methods in Economics

Nicole Fortin, Thomas Lemieux, Sergio Firpo

NBER Working Paper No. 16045
Issued in June 2010
NBER Program(s):   LS

This chapter provides a comprehensive overview of decomposition methods that have been developed since the seminal work of Oaxaca and Blinder in the early 1970s. These methods are used to decompose the difference in a distributional statistic between two groups, or its change over time, into various explanatory factors. While the original work of Oaxaca and Blinder considered the case of the mean, our main focus is on other distributional statistics besides the mean such as quantiles, the Gini coefficient or the variance. We discuss the assumptions required for identifying the different elements of the decomposition, as well as various estimation methods proposed in the literature. We also illustrate how these methods work in practice by discussing existing applications and working through a set of empirical examples throughout the paper.

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Document Object Identifier (DOI): 10.3386/w16045

Published: “Decomposition Methods in Economics” (with Sergio Firpo and Nicole Fortin), in D. Card and O. Ashenfelter, eds., Handbook of Labor Economics, 4 th Edition, Elsevier North Holland, 2011, pp. 1-102.

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