Assorted links by Tyler Cowen March 25, 2012 at 4:59 pm in 1. How reliable are grades?, from the Fairfax Times. 2. Interview with Nick Bostrom on existential risk. 3. How movie stars are insured. 4. MIE: how to lower the crime rate in El Salvador. 5. Karl Smith on bubbles and the term structure, and the new Greek yield curve. 6. Chinese fiscal (monetary) policy.