In reply to Marcel Goh.
Elaborating on my earlier comment, letting and
be conditionally independent trials of
, I think I can show that
assuming Lemma A.2 as well as (24) and (25) from Theorem 3.1 in the older paper. This is not exactly (28), and I’m not sure how to transform the
into a
, since
gives us a lot more information than
from the coupling $X_1+Y_1 = X_2+Y_2$. (At least I think it does.)