【正文】
WA WB before migration WA falls and WB rises with migration When WA = WB, migration stops In this type of perfectly functioning market, ine/worker converges across regions and regional disparities will be eliminated. In this case, government interference will impede the adjustment of markets and cause the problem of regional disparities to be perpetuated. In practice, this market adjustment mechanism does not work as the theory predicts, at least not to the point where disparities are eliminated. Why not? ? Not all workers are the same. Workers in B may not have the skills required for jobs in A. ? Some people may not want to move for personal or noneconomic reasons. ? Government rules and programs may reduce incentives to move or increase incentives to stay. ? Workers in the high wage region will not support equalization if this means their wages will fall. ? Markets are not perfect. Capital markets inside a country should behave in a similar manner but often do not. In other words, it may be difficult to get capital to move to poorer regions even though returns to capital may be higher there because capital is relatively scarce. If returns are higher, capital should move to less developed regions and the new investment this creates will in turn help to develop the poor region. But this does not happen much of the time. If the market adjustment mechanism worked as the theory says it will, there would be no problem of regional disparities. Because the adjustment does not work pe