Technological progress builds upon itself, with the expansion of invention in one domain propelling future work in linked fields. Our analysis uses 1.8 million U.S. patents and their citation properties to map the innovation network and its strength. Past innovation network structures are...

A fundamental problem in the scientific field of technical change and technological forecasting is to detect the driving technical characteristics of new technology in order to predict evolutionary pathways. The vast literature in economics of innovation has analyzed many aspects of technical...