In his lead paper in a symposium carried in Research in Political Economy in 1999,[REF] Laibman's key argument was that the falling rate of profit exhibited in Kliman (1996)[REF] depended crucially on the paper's assumption that there is fixed capital which lasts forever.
These and other arguments were answered in Alan Freeman and Andrew Kliman's (2000) lead paper in a second symposium,[REF] published the following year in the same journal.