Fixed-effect meta-analysis
= Fixed-effect meta-analysis
{title2=$\widehat\mu=\sum_iw_iy_i/\sum_iw_i$}
A common-effect synthesis treats study estimates as estimates of one shared effect. For <independent> approximately unbiased estimates $y_i$ with <variances> $v_i$, use $\widehat\mu=\sum_iw_iy_i/\sum_iw_i$ with $w_i=v_i^{-1}$. This model does not accommodate additional <between-study heterogeneity>.