This is the Calculated Risk article I alluded to. Bill has been beating that drum consistently in the last 12 mo or so:
http://www.calculatedriskblog.com/2014/09/update-p...
Some excerpts:
Changes in demographics are an important determinant of economic growth, and although most people focus on the aging of the "baby boomer" generation, the movement of younger cohorts into the prime working age is another key story in coming years.
The prime working age population peaked in 2007, and appears to have bottomed at the end of 2012. The good news is the prime working age group has started to grow again, and should be growing solidly by 2020 - and this should boost economic activity in the years ahead.
To look at demographics one needs to look at the full picture. We may have a lot of baby boomers retiring, but on the other hand we have tons of people coming into prime working age and forming families and buying houses. Also, I suspect baby boomers are increasingly staying put and not moving anywhere, esp in the Bay Area and other warm parts of the country. Anyone has data on that?