Jessica Irvine, journalist, in The Sydney Morning Herald 6 April 2011
There's an old economist joke: an economist is walking with a friend when they both notice a $100 note lying on the footpath. As the friend bends to pick it up, the economist shakes her head and says: ''Don't bother! If it were a real $100 note, someone would have picked it up already.''
Col Shephard, Yamba identity, in The Sydney Morning Herald 7 April 2011:
About that economist and the $100 note lying on the footpath: if the economist, in a fleeting moment of total irrationality, picked up the note and found it was genuine, he or she would immediately say there are only two things that can be done with it. Spend it or save it.
On the other hand, the economist's friend would look for its rightful owner.