A bit unclear - it says

> Weller’s largest study yet is due to be published later in 2019

But in the header, it also says

> Updated May 31, 2024

I'd still love to know whether there has been further research in the meantime.

And https://web.archive.org/web/20260000000000*/https://www.outs... seems to suggest 2021. I guess we'll put that above, although we had 2019 in the 2022 thread (https://news.ycombinator.com/item?id=48715020) :)