[R-meta] Studies that use several formulas to capture the same outcome
Jack Solomon
kj@j@o|omon @end|ng |rom gm@||@com
Wed Jul 7 04:31:24 CEST 2021
Hello All,
Studies in my study pool have used different formulas to capture the same
construct. Ideally, I want to be able to generalize beyond the set of
formulas used in my study pool.
But, given the structure of my data (below), I wonder whether to use
"formula" as a random effect nested (while it doesn't vary within studies)
in studies or simply use "formula" as a study-level moderator?
```
rma.mv(yi, vi, random = ~ 1 | study/formula)
# OR
rma.mv(yi ~ formula, vi, random = ~ 1 | study)
```
Many thanks, Jack
study formula
1 2
1 2
2 1
2 1
3 1
4 2
4 2
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