When Does Domestic Saving Matter for Economic Growth? Philippe Aghion and Diego Comin, January 4, 2009, Paper. "Can a country grow faster by saving more? We address this question both theoretically and empirically. In our theoretical model, growth results from innovations that allow local sectors to catch up with frontier technology. In poor countries, catching up requires the cooperation of a foreign investor who is familiar with the frontier technology and a domestic entrepreneur who is familiar with local conditions..." Link