Assorted links by Tyler Cowen May 13, 2014 at 12:20 pm in 1. Ants blockade their emergency exits. 2. Numerosity and income inequality. 3. What do we know about momentum investing? 4. Why marijuana shops are forced to run like lemonade stands. (A short meditation on the productivity of banking.) 5. Will stand-up comedy make it in China? 6. Legal medical marijuana seems to cause more binge drinking.