Sunday assorted links

1. Some graphs on the evolution of market concentration in the United States.

2. There is only one reliable rule of thumb in macro.

3. Rob Atkinson on big business (WSJ).  And on the import of middle managers (WSJ, speculative).

4. A claim that 95 percent of Bitcoin trading is fake — can any of you speak to this?

5. Video of my economics vs. philosophy debate/dialogue with Agnes Callard at University of Chicago.  Long (three hours), lots of content not available elsewhere in any other form.

6. Video of a vortex of thousands of puffins flying.  Short.


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