[R-meta] Random-effects meta-analyses with inverse-variance weights cannot include studies with sample sizes of two?

[Michael Dewey]

Can you just clarify Patrizio, does the referee mean that an individual 
primary study must have a sample size greater than two or that your 
meta-analysis must include more than two primary studies? Either way it 
seems dubious to me.

Michael

On 02/11/2018 09:38, Patrizio Tressoldi wrote:
> A need your advise about a referee comment: "random-effects
> meta-analyses with
> inverse-variance weights cannot include studies with sample sizes of two".
> 
> Is this statement correct, and if yes, why?
> 
> Thanks
> Patrizio
> 
> -- 
> Patrizio E. Tressoldi Ph.D.
> Dipartimento di Psicologia Generale
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> https://orcid.org/0000-0002-6404-0058
> 
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Michael
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