has_specified_input random effect model meta analysis DerSimonian-Laird estimator meta analysis by DerSimonian and Leard method Philippe Rocca-Serra a meta analysis which relies on the computation of the DerSimonian and Leard estimator as a measure of heterogeneity over a set of studies. http://www.inside-r.org/packages/cran/meta/docs/metacor metacor(cor, n, studlab, data=NULL, subset=NULL, sm=.settings$smcor, level=.settings$level, level.comb=.settings$level.comb, comb.fixed=.settings$comb.fixed, comb.random=.settings$comb.random, hakn="FALSE", method.tau="DL", tau.common=.settings$tau.common, prediction=.settings$prediction, level.predict=.settings$level.predict, method.bias=.settings$method.bias, backtransf=.settings$backtransf, title=.settings$title, complab=.settings$complab, outclab="", byvar, bylab, print.byvar=.settings$print.byvar, keepdata=.settings$keepdata ) metadata incomplete