The poster child of this story on CNN.com today is Jack Borden, a 101-year-old attorney who practices fulltime in Weatherford, Texas. Retirement is the last thing on his mind. “I have to use a walker because of old age, so there's not much else I could do except sit in my house. Why do that when I can not only enjoy life, but help some people?" In Borden’s view, as in Bill and Ruth Stein’s,  limited mobility is a catalyst for staying on the job rather than a reason to take a load off.

Yay for the Center for Retirement Research, which is doing its part to rectify the dearth of research on workers age 65 and up.  Dubbing their subjects “the elderly,” a paper by economists Steven Haider and David Loughran titled “Elderly Labor Supply: Work or Play?” looks at who in this group works, at what, and why they stop. Here are some of their findings, some predictable and some considerably less so:

I’m lucky to be working with writer-editor and extremely sharp friend Marisa Bowe, who co-edited a terrific book called Gig: Americans Talk About Their Job at the Turn of the Millennium. She’s been reviewing my interview transcripts, and pulled the following quote out of my talk with Eddie Lewis, who worked for forty-three years as a milkman before getting hired by the local funeral home. “How come you didn’t get a job with better hours?” I asked, after prying out of him the fact that he’d never liked the 2:30AM wake-up call. “I don’t know. I never thought of it,” Lewis replied.

Yesterday was the first day of my Visiting Fellowship at Yale Law School, where my colleagues are focused on the implications of new information technologies.   Like, say, Twitter. And sometimes the universe just hands you something, like this story about Twitter user Ivy Bean published by CNN on her 104th birthday.

I’m deep into the book proposal, currently wrangling with the chapter on Identity (the fifth Terror of Aging on my list being “I’ll be invisible.")  Late life puts a different spin the link between work and identity, and I really liked Dave Davison’s take on things.  I interviewed the Silicon Valley entrepreneur and venture capitalist in his gracious living room not far from the Stanford University campus.