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2013 Jan 23
1
mixed effects meta-regression: nlme vs. metafor
...on the web, you once were able to prevent the fitting of the extra variance parameter in some pre-1998 S-plus versions of nlme using a "lmeControl(sigma=1)" option, but this does not appear to available any more. I again get /almost/ what I want using the "metafor" package: rma01 <- rma(yi = effect, vi = se2, mods = ~ treatment + treatment*time - time - 1, data = dat) "rma()" will correctly digest the provided standard errors, but this time the problem is that "rma()" will always treat each line in the dat...