Assorted links by Tyler Cowen May 20, 2011 at 11:13 am in 1. Some simple economics of unions, and part II. 2. This link will control Bryan Caplan’s brain. 3. AidWatch blog is to end. 4. PBS interviews me on ethnic dining and Ethiopian food. 5. McKinsey debate on productivity, me vs. Andrew McAfee and Erik Brynjolfsson. 6. How DSK spent his evenings.