I worry when economists stray too far from their area of expertise.
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4957529&dgcid=ejournal_htmlemail_urban%3Aeconomics%3Aregional%3Astudies%3Aejournal_abstractlink
Off for a read and presumably a few pots of coffee to understand this paper...
I now know why both wars lasted so long. Everybody was struggling with the maths necessary to actually fight :-[