Vellos, we'll probably just disagree on this one flat out, I tend to believe that the urbanization pre-900 was for military rather then capital creation reasons. After all, one of the major things the Solow model types would have considered capital would have been the animals and whatnot. This all changes once we get stable shipping again, but BM doesn't seem to have real trade routes except for when nobles hoof it, so we're talking about Autarkies here.
Not that european economic models are really my area, so you're probably right and I'm just being hard-headed *l*.
