The Internet and mobile telephones have made everyone more aware than ever of the computer revolution and its effects on the economy and society. As Time Goes By puts this revolution in the perspective of previous waves of technical change: steam-powered mechanization, electrification, and motorization. It argues for a theory of reasoned economic history which assigns a central place to these successive technological revolutions.

Published with the aim of enriching the literature dealing with the measurement of scientific and technological activities.