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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Psychol Methods. 2012 Aug 20;17(4):642–664. doi: 10.1037/a0029311

Figure 6.

Figure 6

Boxplots illustrating bias for the unadjusted (UA), regression-adjusted (RA), and inverse propensity weighted (IPW) estimates for the models with an interaction between T and Z.