The earnings experience of rural-urban migrants in Korea

"Migration models in the Harris-Todaro tradition imply that urban informal sector earnings are less than rural sector earnings. Examining the situation for [South] Korea, we find that both urban formal and informal sector earnings exceed earnings opportunities in rural areas, making rural-urban migration the best decision for the individual and for the Korean economy in terms of maximizing output.... The implication for policy makers is that government efforts may be better directed toward mitigating the externalities caused by over-crowding, rather than attempting to influence population movements."