 He was also author of many works of historical economic analysis, including "" and several other reference books on the same topic.Until the end of his life, Maddison lived in Chevincourt, near Thourotte (France), but maintained strong connections with the University of Groningen.He was the joint founder and intellectual leader of the Groningen Growth and Development Centre, a research group within the Faculty of Economics in Groningen that focuses on long-term economic growth.