They are a breed apart, the data show.

Compared to "on-site workers" they are...

Ten percent more likely to be white Twice as likely to be 55 or older More than five times more likely to be self-employed More likely to list themselves as "management" More likely to be female More than twice as likely to have an "irregular schedule" Earn less annual income, but live in homes with higher earnings

Peter Mateyka, the lead author of the report, explained the income anomaly has to do with the age and profession of home-based workers.

But among homebodies, computer programmers saw the largest growth 2000 and 2010 — 69 percent.