I have written on this before. Marx offers two models of the economy.
In vol. 1 and the first part of vol. 2, he describes the production of a
typical commodity as a sequence of operations. He refers to this set up
as antecedent labor.
In the last 3/4 of vol. 2 and vol. 3, he refers to production as a system
where people working on inputs and final products work side by side as
coexisting labor.
The notion of constant capital is very different within these 2 perspectives.
-- Michael Perelman Economics Department California State University Chico, CA 95929Tel. 916-898-5321 E-Mail michael@ecst.csuchico.edu