Some corrections of the significance level in meta-analysis

Annette Böckenhoff and Joachim Hartung

No 1998,23, Technical Reports from Technische Universität Dortmund, Sonderforschungsbereich 475: Komplexitätsreduktion in multivariaten Datenstrukturen

Abstract: In many applications we obtain test statistics by combining estimates from different experiments or studies. The usual combined estimator of the overall effect in independent studies leads to systematic overestimates of the significance level, see Li et al. (1994). This results in a great number of unjustified significant evidences. By examination of the convexity of composed functions involved and application of higher and inverse moments of the chi-square distribution we propose corrections for the estimated standard deviation of the overall effect estimator. Analytical results and simulations show that we improve the estimated significance level in such models.

Keywords: meta-analysis; significance level; combined estimator (search for similar items in EconPapers)
Date: 1998
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Citations: View citations in EconPapers (8)

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Persistent link: https://EconPapers.repec.org/RePEc:zbw:sfb475:199823

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