Treatment Spillover Effects across Survey Experiments

John E. Transue, Daniel J. Lee and John H. Aldrich

Political Analysis, 2009, vol. 17, issue 2, 143-161

Abstract: Embedding experiments within surveys has reinvigorated survey research. Several survey experiments are generally embedded within a survey, and analysts treat each of these experiments as self-contained. We investigate whether experiments are self-contained or if earlier treatments affect later experiments, which we call “experimental spillover.” We consider two types of bias that might be introduced by spillover: mean and inference biases. Using a simple procedure, we test for experimental spillover in two data sets: the 1991 Race and Politics Survey and a survey containing several experiments pertaining to foreign policy attitudes. We find some evidence of spillover and suggest solutions to avoid bias.

Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:cup:polals:v:17:y:2009:i:02:p:143-161_00

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