Assorted links by Tyler Cowen June 18, 2013 at 12:55 pm in 1. Would you settle for a flying train? 2. Did killing lots of people in WWII postpone the great stagnation?, and more here. 3. Did the Romans make better concrete than we do? 4. Where do NBA players come from? 5. Is there a classical world at all? And Fitch on Chinese credit. 6. On the narrowness of the Myriad Genetics ruling.