In the late 1970s, a large part of athletic shoe production shifted from plants in the United States to plants in South Korea. In late 1993, it was reported that South Korean shoe firms had suffered a large reduction in jobs and sales because, due to rising wages, shoe production had shifted to Indonesia and China. How might these moves in product location fit the product cycle theory? Could Heckscher-Ohlin also be of value in explaining these developments? Why or why not?