Pasinetti's [Pasinetti, L.L., 1960. A mathematical formulation of the Ricardian system. Review of Economic Studies 27, 78-98] model formalizing Ricardian growth theory and one of the simplest models developed within the 'new' growth theory [Rebelo, S., 1991. Long run policy analysis and long run...

The paper discusses the problem of innovations and profits from a Schumpeterian perspective using the analytical tools of modern classical economics. The concept of "circular flow" is formalised and Schumpeter's zero-profits assumption investigated. Next a typology of process innovations is...