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Inference on counterfactual distributions

Authors: Victor Chernozhukov , Ivan Fernandez-Val and Blaise Melly
Date: 13 May 2013
Type: cemmap Working Paper, CWP17/13
DOI: 10.1920/wp.cem.2013.1713

Abstract

Counterfactual distributions are important ingredients for policy analysis and de-composition analysis in empirical economics. In this article we develop modelling and inference tools for counterfactual distributions based on regression methods. The counterfactual scenarios that we consider consist of ceteris paribus changes in either the distribution of covariates related to the outcome of interest or the conditional distribution of the outcome given covariates. For either of these scenarios we derive joint functional central limit theorems and bootstrap validity results for regression-based estimators of the status quo and counterfactual outcome distributions. These results allow us to construct simultaneous confidence sets for function-valued effects of the counterfactual changes, including the effects on the entire distribution and quantile functions of the outcome as well as on related functionals. These confidence sets can be used to test functional hypotheses such as no-effect, positive effect or stochastic dominance. Our theory applies to general counterfactual changes and covers the main regression methods including classical, quantile, duration and distribution regressions. We illustrate the results with an empirical application to wage decompositions using data for the United States.

As part of developing the main results, we introduce distribution regression as a comprehensive and flexible tool for modelling and estimating the entire conditional distribution. We show that distribution regression encompasses the Cox duration regression and represents a useful alternative to quantile regression. We establish functional central limit theorems and bootstrap validity results for the empirical distribution regression process and various related functionals.

This is a revision of CWP05/12 and CWP09/09

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Now published:
Victor Chernozhukov, Ivan Fernandez-Val and Blaise Melly November 2010, Inference on counterfactual distributions, Journal Article, Wiley
Previous version:
Victor Chernozhukov, Ivan Fernandez-Val and Blaise Melly February 2012, Inference on counterfactual distributions, cemmap Working Paper, CWP05/12, Institute for Fiscal Studies
Victor Chernozhukov, Ivan Fernandez-Val and Blaise Melly May 2009, Inference on counterfactual distributions, cemmap Working Paper, CWP09/09, The IFS

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