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Treatment interaction with non-experimental data in Stata


Reference:

Brown, G. K. and Mergoupis, T., 2011. Treatment interaction with non-experimental data in Stata. Stata Journal, 11 (4), pp. 545-555.

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Abstract

Treatment effects may vary with the observed characteristics of the treated, often with important implications. In the context of experimental data, a growing literature deals with the problem of specifying treatment interaction terms that most effectively capture this variation. Some of the results of this literature are now implemented in Stata. With non-experimental (observational) data, and in particular when selection into treatment depends on unmeasured factors, treatment effects can be estimated using Stata's treatreg command. Although not originally designed for this purpose, treatreg can be used to consistently estimate treatment interactions parameters. In the presence of interactions, however, adjustments are required to generate predicted values and estimate the Average Treatment Effect (ATE). This paper introduces commands that perform this adjustment for the case of multiplicative interactions and shows the adjustment that is required for more complicated interactions.

Details

Item Type Articles
CreatorsBrown, G. K.and Mergoupis, T.
Related URLs
URLURL Type
http://people.bath.ac.uk/gkb22/resources.htmlAuthor
DepartmentsFaculty of Humanities & Social Sciences > Economics
Faculty of Humanities & Social Sciences > Social & Policy Sciences
Research CentresCentre for Development Studies
RefereedYes
StatusPublished
ID Code26632

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