Assorted links
1. Vending machine markets in everything, seedbombs.
2. Why a United States of slow growth is so problematic.
3. Ezra Klein makes the case for U.S. economic optimism. The case for pessimism, I would say, is that the case for optimism is drawing on true facts, and yet growth still is relatively slow.
4. Does Twitter have a negative and also liberal bias?
6. Colin McGinn on Ray Kurzweil, and what is wrong with the Brain Activity Map proposal?