This paper presents a Schumpeterian quality-ladder model incorporating the impact of new General Purpose Technologies (GPTs). GPTs are breakthrough technologies with a wide range of applications, opening up new innovational complementarities. In contrast to most existing models which focus on the events after the arrival of a new GPT, the model developed in this paper focuses on the events before the arrival if R&D firms know the point of time and the technological impact of this drastic innovation. In this framework we can show, that the economy goes through three main phases: First, the economy is in its old steady state. Second, there are transitional dynamics and finally, the economy is in a new steady state with higher growth rates. The transitional dynamics are characterized by oscillating cycles. Shortly before the arrival of a new GPT, there is an increase in R&D activities and growth going even beyond the old steady state levels and immediately before the arrival of the new GPT, there is a large slump in R&D activities using the old GPT.
Schumpeterian growth research and development general purpose technologies