[vbuwivbiu]

your reply made me question myself so I got Skin in the Game off the shelf and whadddayknow he _does_ give a definition:

"Perfect ergodicity means that each one of us, should he live forever, would spend a proportion of the time in the economic conditions of the entire cross-section[of the U.S. population]: out of, say, a century, an average of sixty years in the lower middle class, twenty years in the blue-collar class, and perhaps one single year in the one percent"