An elderly lady was introduced to a Doctor Stevens at a party.  At the first opportunity, she cornered the man and said, “Doctor, I’m so happy to meet you.  I’d like to ask you a question.  Lately I’ve been getting terrible pains on my right side when I lift my arm like this.  What should I do about it?”

The man answered, “I’m sorry, Madam, but I’m not that kind of a doctor.  I happen to be a Doctor of Economics.”

The lady was taken aback for a short moment, then regained her composure and asked, “So tell me, should I sell my stock in General Motors?”