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P-hacking and Significance Stars

Author

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  • Costanza Naguib

Abstract

In mid-2016, all journals of the American Economic Association (AEA) stopped including significance stars in their regression tables. This policy aimed to reduce the emphasis on statistical significance and shift focus toward the broader economic importance of research findings. This study examines the impact of this change on p-hacking and publication bias. The findings indicate some reduction in the bunching of the reported test statistics just beyond the 5%-significance threshold in the treated journals after 2016. However, the effect is modest.

Suggested Citation

  • Costanza Naguib, 2024. "P-hacking and Significance Stars," Diskussionsschriften dp2409, Universitaet Bern, Departement Volkswirtschaft.
    • Handle: RePEc:ube:dpvwib:dp2409
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    More about this item

    Keywords

    p-hacking; significance stars; publication bias; difference-in-difference;
    All these keywords.

    JEL classification:

    • A11 - General Economics and Teaching - - General Economics - - - Role of Economics; Role of Economists
    • A14 - General Economics and Teaching - - General Economics - - - Sociology of Economics
    • C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General

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