More links, including more grade inflation and granger causation for hangover searches

A confession (here), grades for sale (here), and what my office is going to be like in about a week or so (here).
Searches for "mixed drinks" empirically cause searches for "hangovers" on google (HT to Hal Varian, here).
Yuan-na revalue? (Ouch! here)
5 private sector bureaucrats per doctor (here)
Should I rent or should I buy? (here)
Five cool graphs, in case you wonder why fuel efficiency hasn't improved (read: don't blame producers, here)