This paper sketches a theory of the secular decline in morbidity and mortality that takes account of changes in human physiology since 1700. The synergism between technological and physiological improvements has produced a form of human evolution, much more rapid than natural selection, which is...

This paper is an extensive revision and expansion of Working Paper No.1402. It centers on a new time series of life expectations in the U.S. since 1720, which has been constructed from the NBER/CPE pilot sample of genealogies. Native-born Americans achieved remarkably long life expectations...

This paper uses the data in the NBER/CPE pilot sample of genealogies to create a new time series on life expectation in the U.S. since 1720. After attaining remarkably high levels toward the end of the eighteenth century, life expectation as measured by e0(10) began a decline that lasted about...

It is generally accepted that the rapid economic growth in South Korea during the second half of the twentieth century greatly improved the standards of living of the country’s population. However, it is not fully understood how the living conditions in South Korea changed over time, and what...