In nested multilevel models we model variability between experimental units within rather than across groups of interest, hence nested. In the simplest case one group is known a priori to have much lower variability between experimental units than another and estimating this variability across both …

Here’s why that Jacobian adjustment is needed when using s2z in the centered model. Let’s start at why the sqrt(N / (N - 1)) thing comes up and then what adding \sigma does. Why \sqrt{N / (N - 1)}? The sum-to-zero constraint is effectively pre-multiplying x by an orthogonal basis. The basis used i…

Proper use of sum_to_zero_vector in nested multilevel models

Modeling

ssp3nc3r May 24, 2025, 4:52pm 7

I think this is what your referring to: Rstudio Stan syntax checker is outdated

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Proper use of sum_to_zero_vector in nested multilevel models

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