Assorted links by Tyler Cowen December 7, 2011 at 11:58 am in 1. How the sellers of wedding dresses limit arbitrage, and is the Target 2 debate all screwed up? 2. How to reemploy some ZMPers (an epistolary romance), and British royalty adopt ZMP Greek donkeys. 3. No one has a good theory of collateral. 4. Markets in everything, at two different levels, British royalty edition, via Bob Cottrell. 5. Blog with Perry Mehrling and others. 6. What the Khan Academy is really up to, namely measuring when learning occurs or not.