This paper forms part of an extended debate which Andrew Kliman and I conducted with Simon Mohun and Roberto Veneziani, in the pages of Capital and Class. The paper should be cited as ‘‘Replicating Marx: a reply to Mohun’, Capital and Class No. 88, Spring 2006, pp 117-123. (ISSN 0309 8168). It was reprinted in In Kliman, A. and N. Potts. (eds) 2015. Is Marx’s Theory of Profit Right?: The Simultaneist–Temporalist Debate. Lanham, MD: Rowman and Littlefield. See also our 2008 Summing up.