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When meta-analysis goes wrong.
A recent study on homeopathy shows reminds us that meta-analysis, can look superficially solid yet still produce nonsense.
"And yet meta-analyses are fucked. Fucked, as Inzlicht said, because the scientific literature is fucked: the literature is full of bad studies, and regardless of how well you do your meta-analysis, if the studies you put into it are bad, your conclusions will be bad as well."
Stuart Ritchie