I was reading this
Over 52? Then you're probably grumpy | Reuters
And it reminded me of a debate amongst economists and psychologists about whether we should try to measure hedonia alongside traditional economic meausures. Indeed others would suggest we should be measuring eudaimonia. However measuring these is quite difficult, though the above survey suggests such might be feasible.While infants laughed up to 300 times a day, that figure had fallen to an average of six laughs by teenage years and only 2.5 daily chuckles for those over 60, the survey for cable TV channel Dave found.
So what about chuckles per capita... or can you think of other measures ?