We note with sadness learning of the passing of John C. Fisher on 2 May 2018 at age 98. With Robert Pry, John Fisher developed the classic A simple substitution model of technological change JC Fisher, RH Pry – Technological Forecasting and Social Change 3, pp76-88, 1971. Much of our work (especially by Perrin Meyer, Jason Yung, and David Burg) has built on the Fisher-Pry model, culminating in the software package Loglet Lab 4.
The interesting account of John’s life and career by his family would have been more complete if it included discussion of the substitution model. The General Electric Corporation research labs have made extraordinary contributions.