The Turn-around in the Production Pattern and Internal Geography by the Foreign Innovation

the main framework is based on the two good--two country--three region Ricardian Model, including migration. We manifest that, even if the technology is improved in the foreign country at a moderate level so as not to exceed the technology in one advanced region in the home country and so as to surpass that of the other less advanced region, the production pattern will totally change between the home country and the foreign country by people concentrating in the technologically less advanced region in some cases. On the other hand, through the concentration on the adbvanced region, the production pattern will not change at all despite of innovation, and the foreign country may reverse to the original production pattern before the innovation.