Any demographers on HN? 'Life expectancy' is itself like GDP of health, a complicated scorecard that includes a lot of things. I would be real interested in an

Any demographers on HN? 'Life expectancy' is itself like GDP of health, a complicated scorecard that includes a lot of things. I would be real interested in an accessible breakdown of demographic ideas 'Infant mortality ratio has come down to 42 in 2012 from 58 per 1,000 live births in the 2005.' My back-of-the-envelope has this contributing 1 year to life expectancy at birth. Additional (surviving babiesaverage lifetime)/1000 = (58-42)65/1000 "Maternal mortality ratio has declined from 301 per 100,000 live births in 2001-03 to 212 in 2007-09," the health ministry said. - I think this contributes another 4-5 months. I'd also be interested in some related questions & gratuitous scifi-like speculations. When are we likely to see 60 year old sports stars. Bernard Hopkins seems to be intent on becoming a 50 year old undisputed boxing champion. When are we likely to see 100 year olds working productively, enjoying physical hobbies, sexually active, sexually attractive… :)