Assorted links by Tyler Cowen March 26, 2010 at 6:56 am in Web/Tech 1. Rats can cooperative in the Prisoner's Dilemma. 2. The economics of OCLC; a dozen employees earn more than $200,000. 3. Population density facts. 4. Business model of Somali pirates. 5. Health care failures, by Patrick Ruffini.