Testing for Publication Bias in Political Science

Author(s): 

Alan S. Gerber, Donald P. Green, David W. Nickerson

ISPS ID: 
ISPS01-001
Full citation: 
Gerber, Alan S., Donald P. Green & David W. Nickerson (2001) "Testing for Publication Bias in Political Science." Political Analysis 9: 385-92.
Abstract: 
If the publication decisions of journals are a function of the statistical significance of research findings, the published literature may suffer from ā€œpublication bias.ā€ This paper describes a method for detecting publication bias. We point out that to achieve statistical significance, the effect size must be larger in small samples. If publications tend to be biased against statistically insignificant results, we should observe that the effect size diminishes as sample sizes increase. This proposition is tested and confirmed using the experimental literature on voter mobilization.
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Publication date: 
2001
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