The paper suggests a consistent interpretation for the much debated Z-footnote on pp. 55-56 of the General Theory and discards claims recently made in the literature concerning the importance of output heterogeneity for Keynes’s macroeconomic approach

The purpose of this paper is to provide an analysis of the impact the UV-curve had on economic theory and to provide an account of the subsequent radical changes in its place and role over the decades since its first appearance in 1958. The paper traces the historical development of the UV-curve...