Out of curiosity, would you know the name of that paper you mentioned about medieval demographics? It sounds incredibly interesting and I’d love to read it?

Unfortunately, I don’t and I don’t know how to find it. This would have been 2001-2002; I definitely got rid of the computer I had back then, my email address from when I was an undergrad is no longer functional, etc. 

However, when I was doing the research for that post, I found J.C Russell (1958 and 1985) quite useful. So start with those and then pillage the footnotes.