Assorted links by Tyler Cowen March 1, 2011 at 12:09 pm in Web/Tech 1. The economics of principal write-downs. 2. Saturn's Hyperion: a moon with odd craters, more astronomy photos here, via GH. 3. Different ways supermarkets increase their profit margins. 4. What economists know about open source software. 5. Peto's paradox: why is there no correlation between animal body size and cancer?, plus a meditation on blue whales. 6. The new Banerjee-Duflo book. 7. Reihan on Brink Lindsey and TGS.