ABSTRACT
Author's note I have decided to include a shortened version of a recent paper on chemical engineering in this volume because it is, I believe, very much in the Schumpeterian spirit. It was written while I was preparing the Schumpeter lectures but, more importantly, it was influenced by my past reading of Schumpeter. If, indeed, Schumpeter regarded technological change as endogenous, as I have argued, then surely that endogeneity must include the growing body of technological knowledge that provided the intellectual basis for the design and construction of new technologies.
