The Dispute of the Theory of Labor Value and Marx's Research Methods

In the dispute of the theory of labor value,its reality and logical consistency were doubted.An important basis of the defending against such doubts is Marx's research methods of starting from abstraction to concrete.Marx's remarks on the correct research methods of political economy and the demonstrating structure of The Capital supported the defending.But in his research on political economy,Marx didn't practice the method of starting from abstraction to concrete,but from concrete to abstraction and then to concrete again.According to the former method,the criterion of the theory of labor value is the holistic logical consistency of Marxism Political Economy;but according to the latter,the criterion is practice.