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P值操纵与显著性星号

P -hacking and Significance Stars
The Economic Journal · 2026 · Costanza Naguib

中文摘要

2016年年中,美国经济学会旗下所有期刊停止在回归表中标注显著性星号。该政策旨在减少对统计显著性的强调,并将关注点转向研究结果更广泛的经济重要性。本研究考察这一变化对P值操纵和发表偏误的影响。我采用双重差分设计,以及Elliott等人(2022b)提出的一系列检验。我未发现该政策产生了统计显著的影响。

Abstract

Abstract In mid-2016, all journals of the American Economic Association stopped including significance stars in their regression tables. This policy aimed to reduce the emphasis on statistical significance and shift the focus to the broader economic importance of research findings. This study examines the impact of this change on p-hacking and publication bias. I employ a difference-in-difference design, as well as the battery of tests proposed by Elliott et al. (2022b). I find no statistically significant effect of this policy.
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