the mines well.....it should depend on the mine really. iron mines should definitly affect troup recruitment costs and subsequent armor and weapon upgrades. same could aply for copper and tin mines if they exist but to a more limited scope. silver and gold mines should provide great boost to the economy in general as they would be primary sources for the working of the mints. they should also generate huge raw financial income becouse of that same reason. now if only inflation can be incorporated somehow for the provinces that produce lots of coin and have underdeveloped economy in general and we could begin to build "interesting" economic strategies