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Some Corrections of the Significance Level in Meta-Analysis

✍ Scribed by Annette Böckenhoff; Joachim Hartung

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
162 KB
Volume
40
Category
Article
ISSN
0323-3847

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✦ Synopsis

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, Shi, and Roth (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 c 2 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.

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