I read in somewhere that the per capita annual production of cast iron in the roman empire was on par with per capita annual consumption of cast iron in 15th century England. Assume this is accurate, which economy was likely to have a higher per capita production of cast iron?
Were the ancient economies more likely to have shortage problem or overproduction. If there could indeed be a significant gap between production and consumption, please provide a few examples from historical data, if it is possible.