-----Original Message-----
From: Simon Harmel [mailto:sim.harmel at gmail.com]
Sent: Wednesday, 01 September, 2021 21:19
To: Viechtbauer, Wolfgang (SP)
Cc: Reza Norouzian; R meta
Subject: Re: [R-meta] Confusion about how to use UN structure
Dear Wolfgang,
To correct my question, is it acceptable to not estimate the
correlations (rhos) that are based on too few pairs (i.e., fixing them
to 0) in a "UN" structure but at least estimate the correlations that
are based on a large number of pairs?
Or in such a situation, one has to use a simpler structure like "CS"
or "HCS" and obtain a single rho estimate representing the correlation
among all the pairs of the levels? (Maybe in this case, such a rho
will represent the average correlation among all pairs of the levels,
right?).
This is exactly the situation I'm in now.
Thank you very much,
Simon