Hi Valery,

It was really great talking to you yesterday. I decided to shoot you a
quick email since I noticed this article today, which does an
empirical study of accuracy variance vs. random calibration set selection,
across a bunch of calibration methods:

https://arxiv.org/pdf/2311.09755.pdf

TLDR, they show that you can do significantly better (at least in some
cases) given the choice of data, but they don't look for any
algorithms for doing so (e.g. by examining margins).

Cheers,
David