One takeaway:
Percent engaged increases after 65 not because of age effects, but because of survivor bias: those who work after retirement are primarily those who choose to work.
Percent engaged increases after 65 not because of age effects, but because of survivor bias: those who work after retirement are primarily those who choose to work.
Megan McArdle's take: http://www.theatlantic.com/business/archive/2011/10/the-rage...