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....

Eastern European countries have been transitioning out of communism and some have followed the Latin American and European countries' path of changing from a public social security system, toward a system that includes private accounts. They have chosen mixed systems with private as well as...