In the next 30-40 years, past changes in fertility and mortality will lead to a significant increase in the share of the elderly. This study suggests that these demographic trends may lead to a decline in the G-7 private savings rate after 2000, compounding the impact of social expenditure...

This paper analyzes the effect of public pension system on lifespan and happiness level using optimal longevity model. This paper found the following. Public pension system can make life expectancy longer, however, the extension of lifespan caused by the public pension, not by own decision,...