Other Discussions The ‘Backus-Smith’ puzzle, non-tradable output and international business cycles, by S. Moon, World Finance Conference, Singapore, Dec. 2014 (PDF, 141Ko) Media & blogs China’s one-child policy and saving puzzle, January 2014, Voxeu. China’s consumer babies, by Keyu Jin, November 2013, Project Syndicate. Why are savings patterns so different?, by Keyu Jin, September 2012, Project Syndicate.