Dear all,

I'm trying to run a multilevel meta-regression. The dependent variable
consists in regression coefficients.
I need to restrict the residual variance to 1, and I can't figure it out.

multivariate.r.studies=try(lme(effect.size~pred1+pred2-1,random = list(
study =pdDiag( ~ pred1 +
pred2-1)),weights=varFixed(~(1/weights.a)),control=list(msMaxIter=400000000),data=data.h,method="REML"),silent=T)

I thank you all.

Best regards

                                               Vincenzo Barbaro

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