"This paper examines the implications of unemployment resulting from efficiency wages for international factor movements in a standard Heckscher-Ohlin model where the relative size of the endowments of skilled and unskilled workers and the efficiency wage induced unemployment level in the unskilled labour market are simultaneously determined given the population, supply of capital and its distribution in the economy.... It is shown that the optimum labour inflow in the market with domestic distortion and the optimum capital inflow are always positive because they reduce the severity of distortion by raising employment and income for the residents. The income and employment of foreigners also increase. Under this situation the optimum labour or capital outflow on the other hand is always zero. These conclusions directly contradict the result obtained for international factor movements in the presence of exogenously determined unemployment."

"The link between immigration and unemployment among the native workers of the host country is examined within a model which distinguishes individuals in terms of their ability to perform services in the labor market. An inflow of foreign workers is found to have an ambiguous effect on the level of income received by the native factors of production. This is in sharp contrast to the findings that immigration improves welfare in a fully employed host country and that it unambiguously lowers welfare in a minimum-wage economy with homogeneous labor."