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.
Welcome back. Just a moment while we sign you in to your Goodreads account.