7Peterson, Peter G. (1999). Gray Dawn: How the Coming Age Wave Will Trarder America and the Wodd, New York: Random House.
8Ram, Ratt. (1982). Dependency Rates and Aggregate Savings: A New International Cross- Section Study. American Economic Review, June 1982, 72, 537- 44.
9Bloom, David E, David Canning, and Jaypee Sevilla. (2(D2). The Demographic Dividend : A New Perspective on the Economic Consequences of Population Change. RAND.
10Jackson, Richard and Neff Howe. (2004). The Graying of the Middle Kingdom:the Demographics and Economies of Retired Policy in China. Center for Strategic and International Studies.
