His work on Asian economic history is magisterial.

Globalisation and Asia’s return to economic supremacy:

http://www.finfacts.ie/irishfinancenews/article_1019524.shtml

As Dale Jorgenson has emphasised, the work that transformed debate on research into sources of international economic growth was the publication, in the early 1980s, of Maddison’s Phases of Capitalist Development followed by his Dynamic Forces of Capitalist Development.

These works confronted the fundamental statistical problem that in the Kuznets/Solow approach ‘technology’ was defined as a residual. Maddison synthesised the work of himself and others on economic growth, using the the much more advanced econometric tools that were then available, and showed that most of the [Solow] residual had indeed been ‘a measure of our ignorance’ and not technology. Maddison’s key findings for the post-World War II period are set out in Table 1 and 2.”

Full article, placing Madison’s achievements in the context of the development of modern economic theory can be found here

http://socialisteconomicbulletin.blogspot.com/2009/09/asian-and-chinese-economic-growth.html