Using data from the Human Mortality Database (HMD), the paper analyzes the increase in the life expectancy of the Spanish population during the three decades, 1970-2001, in order to ascertain which age and sex groups have made the most progress in terms of increasing life expectancy. Within the...

Fertility decline, driven by the one-child policy, and son preference have contributed to an alarming difference in the number of live male and female births in China. We present a quantitative model where people choose to sex-select because they perceive that married sons are more valuable than...

The slope and curvature of the survivorship function reflect the considerable amount of variance in length of life found in any human population. This is due in part to the well-known variation in life expectancy between groups: large differences in race, sex, socioeconomic status, or other...