Marx has always been an arguable economist as well as person since first known by the world. Lots of commentators have discussed about Marx’s work. Here I will focus on the two of those economists, Mark Blaug and Fred Moseley.
Generally speaking, the two of them have opposite thoughts over the validity of Marx’s work: Blaug mostly holds negative critiques about the theory while Moseley considers himself as a Marxist and disagrees. In Fred Moseley’s Heterodox Economic Theories: True or False? Moseley starts with his critiques in response to some of Blaug’s work regarding Marx. He goes on and records Blaug’s response back to him. The conversation goes back and forth. It seems that the two economists largely interpreted the ideas in a way that would fit into their existing point of view. Although the core thought remains for both of them: Blaug doesn’t approve of the validity of Marx’s theory and Moseley believes in the opposite, the debate does seem to make an effort for both of them to view Marx in a broader way.
Moseley bases his critique on Blaug’s general appraisal of the empirical validity of Marx’s theory. According to Moseley, Blaug approaches the question of validity with two questions. The first question is: “does Marx's theory provide definite predictions which follow as logical deductions from the premises of the theory, so that the theory can in principle be falsified by contrary empirical evidence?” (Moseley, Marx's economic theory: true or false? P.89) and the second one is: how well do Marx’s conclusions correspond to the empirical evidence? Blaug in his appraisal holds opinions against both questions.
Summary of Blaug’s appraisal
In Moseley’s paper, he summarizes that Blaug breaks down the first question with a couple of separate points, mainly the falling rate of profit and the impoverishment of workers. Other than these two points, Blaug also has some arguments about increasing severity