ABSTRACT
I came to know Heinz D. Kurz in spring 1988 when he became full professor in Graz, where I was working on my PhD. Because of the formal similarity to my own field of research, which was at that time input-output analysis, but also because of his sound arguments, Heinz needed little effort to convince me that the classical approach to economics provides a rigorous theoretical frame for input-output analysis. I dedicate this piece which may help to close the gap between applied input-output analysis and Sraffian economic literature to the Festschrift in honour of my literate teacher and close friend Heinz.
