A group of pupils and colleagues of Maddison therefore decided, after his passing away in 2010, to continue his work, and established the 'Maddison project' for that purpose

(see: http://www.ggdc.net/maddison/maddison-project/index.htm).

Their work has now resulted in an update of the dataset, which incorporates much of the latest research in this field, and presents new estimates - based on Maddison's methodology - of economic growth in the world economic between AD1 and 2010. The new estimates are presented and discussed in Bolt and Van Zanden (The First Update of the Maddison Project; Re-Estimating Growth Before1820 http://www.ggdc.net/maddison/publications/wp.htm)

The new data are available on: http://www.ggdc.net/maddison/

The original Maddison estimates remain available on his personal website

(http://www.ggdc.net/MADDISON/oriindex.htm) that also contains many publications and other info about his life and work.