We develop techniques to estimate the present day value of the future social security benefits of a retiree based upon their chosen date of retirement, the term structure of interest rates, and life expectancy forecasts. These valuation methods are then used to determine the optimal retirement...

Infant mortality rate (IMR) has often been used as an indicator of human development. Thus, a basic understanding of the world would include a study of infant mortality rates. This paper shows world trends in infant mortality rates over the last 50 years. The major trend in IMR over the past...