> (there was a famous study of an Israeli day care that started charging parents a fee if they picked up their child late, then tried to change back to the prev

> (there was a famous study of an Israeli day care that started charging parents a fee if they picked up their child late, then tried to change back to the previous policy) I see that you too have read Dan Ariely's Predicably Irrational :) Recommended reading for everyone else, by the way. It was an enlightening on the topic of socio-economics, or the application of psychology to economics.