The Reason for the Expansion of Relative Wage: International Trade or Technical Progress

The two important reasons for the wage gap are international trade and technical progress, and it has been debated in the academic world for a long time as for which is crucial. There is no universal conclusion that the trade and technology have something to do with wage gap, because the great influence made by international trade through promoting the technology, and the significant difference about the pattern of foreign trade and technical progress between developed and developing countries. The question that which is the main reason for the expansion of relative wage is not a theological problem, but a practical question. The key point of future research is to solve the difference about the means to measure the international trade and technical program. The key point of the future research is to find the way to measure international trade and technical progress and to consider the difference of different countries.