I don't understand JVM performance

I've been hacking on Breeze lately, which is a scientific library for Scala which aims to replace Scipy. It's got a long way to go, but it's definitely a great library and one that I make significant use of. One of the great things about using the ...

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Excellent paper on Income Mobility

Here is the Chetty Paper. It's a big correlational study done across time in the US, looking at income mobility - comparing children's income at age 30 to that of their parents.

It's been floating around the blogosphere, and the results are surprising:

  1. Income mobility has remained flat ...

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