移民增加导致劳动力供应增加，引起工资降低。因为和土地和资本结合的劳动力数量增加，使资本和土地的边际产量增加，土地和资本的租金也将增加。
With more labor working with capital and land , the marginal product of capital and land is higher , so rents earned by owners of land and capital would increase .
资本的边际产量