but how does it work? (roughly)
city->town->rural?
town->city?
is it 1 way traffic (mostly?) or is it 2 way? eg... consider a insulated 2 region system... will they both have people coming and going at the same time because they both have room?
say you have a city with 10000/50000 and a town (or even rural) with 5000/6000, will they all leg it to the city even though the city can't feed itself and the town gives surplus? remarkably short sighted if that's the case... then again.. peasants being peasants...
