Figure 3From: Improving the error rates of the Begg and Mazumdar test for publication bias in fixed effects meta-analysis Histograms of the simulated distribution of τ ~ under the null hypothesis along with kernal density estimates. These are compared to the density of the asymptotic distribution of Kendall’s tau. A: small meta-analyses (k=25) and a large range of variances (v=0.1,1.0,10.0); B: small meta-analyses (k=25) and a small range of variances (v=0.5,1.0,2.0).Back to article page