I am currently reading a book Foundations of Economics, A Beginners Companion, by Yanis Varoufakis

It is an economics text book which attempts to give a more balanced understanding of economics than the liberal neo classical one, which has been fashionable for some time now.
At the end he has a chapter, The curse of economics.

In it he begins with the following…
Economics can seriously damage your character! An experiment has been done as follows…

The experiment’s structure:

Two players are asked to choose between (1) acting ’aggressively’ and (2) acting ‘cooperatively’.
They choose simultaneously and without knowing who they are playing against.
They are told that their rewards will be determined as follows:
- If you play aggressively and your opponent co operates you get $10
- if both of you cooperate you get $5
- if both of you act aggressively you get $2
- if you cooperate when your opponent acts aggressively you get nothing.