Assorted links

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.


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