The September group had been meeting for several years, and a succession of texts by its members were published. Several of these appeared under the imprint of Cambridge University Press's series "Studies in Marxism and Social Theory", including Jon Elster's Making Sense of Marx (1985) and Adam Przeworski's Capitalism and Social Democracy (1985). Among the most methodologically controversial were these two authors, and Roemer, due to their use of rational-actor models.