1. Econ grad schools should add as a requirement for the PhD that students take a recent published experiment and attempt to replicate it.
  2. Not accepting American Express is a local public good.  Because once enough of them do it, I stop expecting that it will be accepted and stop offering it on the first try.
  3. Homosexuality is a puzzle for evolution not because of the question “how does it survive despite not reproducing?” Because for a gene reproduction *is* survival.  The puzzle is “how do they reproduce despite not wanting to?”
  4. Books get made into films all the time, why do poems rarely get made into pop songs?
  5. Why is it easier to apologize when the offended party isn’t actually upset?

Drawing:  Rain from http://www.f1me.net