nostr:npub1yxz2r8xwr4q7t220k3m26a7pxnz2wq0mygtjeqln2w7yc0jz6nts9k6s8m That would be William Croft (2000). Explaining Language Change: An Evolutionary Approach.

I could have sworn there was a whole big discussion of it, but it seems to be buried in section 7.4 (pages 174-194) on propagation.  Seemed like a huge deal to me when I read it!

(full disclosure: Bill Croft was on my dissertation committee, and my feelings about him are ... complicated)

https://books.google.com/books?id=5_Ka7zLl9HQC