Assorted links by Tyler Cowen November 17, 2012 at 3:42 pm 1. Estimated implicit marginal tax rates for the poor and middle class. 2. The new James Bond movie used a 3-D printer to assemble demolishable copies of Bond’s Aston Martin. 3. Duke and other schools to offer on-line courses for credit. 4. Alarm clock won’t turn off until you dance. 5. Ten possible world-changing ideas? 6. EdX announces proctored exam testing.