How to Solve a Problem Squared

Matt Harford: I have some recently reopened business. A lot of listeners got in touch and said, Hey, someone's ripped off your calculation. So we're moving on to the any other business section of the podcast now where we refer back to previous problems that we've had. Tell us Twitter, Instagram, add a problem squared. If you believe that that could be better solved or indeed, if any other listeners say, Oh, no, actually, I happen to know the perfect response to that, then please let us know at a problem squared,. Or go over to the problem squared dot com page and tell us when the little problem posing stuff there is answered.