The rapidly aging populations of many developed countries--most notably Japan and member countries of the European Union--present obvious problems for the public pension plans of these countries. Not only will there be disproportionately fewer workers making pension contributions than there are...

This paper was prepared in support of Japan’s G20 Presidency. It takes stock of ongoing and projected population ageing across G20 economies and its far-reaching implications for economic growth, productivity, inequality within and between generations and the sustainability of public finances....