Friday, December 2, 2016

Attend In Person or Virtually APPAM/MDRC Institutional Member Forum!

MDRC’s Center for Applied Behavioral Science (CABS) and APPAM are hosting a forum on December 13, 2016 which will explore the future of behavioral science research, practice, and policy. This event, held in DC, brings together distinguished experts from MDRC, academia, and the government to share their work and provide insight on next steps for research, practice, and policy.

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What Works Best and When: Accounting for Multiple Sources of Pureselection Bias in Program Evaluations

July 24, 2014 09:00 AM

Most evaluations are still quasi-experimental and most recent quasi-experimental methodological research has focused on various types of propensity score matching to minimize conventional selection bias on observables. Although these methods create better-matched treatment and comparison groups on observables, the issue of selection on unobservables still looms large. Thus, in the absence of being able to run randomized controlled trials (RCTs) or natural experiments, it is important to understand how well different regression-based estimators perform in terms of minimizing pure selection bias, that is, selection on unobservables.

Authors Haeil Jung and Maureen Pirog examine the relative magnitudes of three sources of pure selection bias: heterogeneous response bias, time-invariant individual heterogeneity (fixed effects [FEs]), and intertemporal dependence (autoregressive process of order one [AR(1)]). Because the relative magnitude of each source of pure selection bias may vary in different policy contexts, it is important to understand how well different regression-based estimators handle each source of selection bias.

Read the full article in the Summer 2014 JPAM or at WileyOnline.

 

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