Assorted links by Tyler Cowen August 7, 2010 at 3:17 am in Web/Tech 1. Kotlikoff responds again. 2. Are credit cards a natural monopoly or duopoly? 3. Monkeynomics talk. 4. Avik Roy surveys health care developments. 5. The new James Flynn essay. 6. This YouTube on Heidegger has four-letter words, spoken by animated rabbits (?). 7. John Gray is upset at Matt Ridley.