Assorted links

1. Bill Gates praises Morton Jerven on African gdp and other mismeasurements.  Chris Blattman comments.

2. Some (partial) results on which learning techniques work.  Drop that highlighter, by the way.

3. She despises The Great Gatsby, I am not so negative but I do not love it.

4. A claim that YouTube will win the internet TV race. 

5. There are more people living inside of this circle than outside of it.

6. Lessons from the experience of the Danes with negative interest rates on reserves; it seems they are liquidity-draining.