I've read most of his assorted treatises, including the one the Nobel committee alleges is 'prizeworthy'. They are uniformly quasi-Marxist, and Krugboy is virtually the ultimate 'economist' advocate of state intervention in EVERY area of a nation's economy.
Who ya kiddin', Andy? Certainly not me, m'friend.
Since the explanation all has to do with the phenomenon of the effect of increasing returns to scale on trade, I am not sure what you think is Marxist about it.