Our final instalment in the debate with Jim Kincaid argues that his value-analysis suffers from weaknesses associated with both Ricardian and Rubinesque interpretations of Marx. These approaches are methodologically flawed, because value-theory does not draw upon externally imposed theories or standards of logic or evidence to check the conceptual or empirical validity of its approach to the understanding of capitalism. Rather, Marxian value-theory involves reconstructing in thought the class-based production-processes underpinning capitalism through to their more complex and concrete consequences in (...) the broader economic and social structures, agencies and processes, through which they are formed, albeit with definite effects of their own. Examination of the methodological shortcomings in Kincaid's analysis is followed by specific rebuttals of his claims about the determination of value and price, the circulation of capital, the role of competition, fixed capital, productive labour and the leverage of value-theory in informing empirical studies. (shrink)