Dear Economist,
I am amazed by people who stand outside in front of the opening doors of trains and lifts knowing full well that the people inside will have to exit before they can enter. Obstructing the Exiters will only delay them, and the Enterers seem to be in such a rush that this is surely not in their best interests. What is astonishing is that this is a universal phenomenon. Explain!
Nazir Kazi

Dear Nazir,