Methods Workshop with Adam Glynn

DateOctober 3, 2014

Time12:00pm to 1:30pm

Location
4357 Bunche Hall

Contact

Presenter:Adam Glynn, Emory UniversityTitle: “Front-door Difference-in-Differences Estimators”Abstract:In this paper, we develop front-door difference-in-differences estimators that utilize information from post-treatment variables in addition to information from pre-treatment covariates. Even when the front-door criterion does not hold, these estimators allow the identification of causal effects under assumptions related to standard difference-in-differences assumptions and allow the bounding of causal effects under relaxed assumptions. We illustrate these points with an application to the National JTPA (Job Training Partnership Act) Study and with an application to Florida’s early in-person voting program. For the JTPA study, we show that an experimental benchmark can be bracketed with front-door and front-door difference-in-differences estimates. Surprisingly, neither of these estimates use control units. For the Florida program, we find some evidence that early in-person voting had small positive effects on turnout in 2008 and 2012. This provides a counterpoint to recent claims that early voting had a negative effect on turnout in 2008.Click here to download the paper. Jointly sponsored with the UCLA Department of Statistics

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