TechCrunch messes up the math on sexism

Eric Ries over at TechCrunch recently wrote an article discussing racism/sexism in Silicon Valley and the technology industry. The article discusses differences in aptitude between men and women, and attempts to downplay them as the cause of a lack of women in technology (and at YC-funded companies, specifically):

Could …

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Why Americans don't hire servants

Recently, Bryan Caplan criticized the ZMP theory of unemployment on the following grounds:

Most economists aren't entrepreneurs. The fact that we can't think of a productive job for a low-skilled worker is weak evidence for ZMP. But if even ivory tower economists can think of productive jobs for low-skilled workers …

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Did immigrants (and Simpson's Paradox) cause the Great Stagnation?

Many people have commented on the fact that, after adjusting for chained CPI, median income has not risen significantly since the 1970's. Tyler Cowen points to this as evidence for his theory of the "Great Stagnation", which purports that the economy has grown more slowly during the latter parts of …

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MapReduce explained in 41 words

Goal: count the number of books in the library.

Map: You count up shelf #1, I count up shelf #2.

(The more people we get, the faster this part goes. )

Reduce: We all get together and add up our individual counts.

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Hadoop's MapWritable sometimes a performance hog

I've been using Hadoop a lot lately for a stealth mode project I'm working on. One of the big lessons I'm learning is that where medium to big data is concerned, data formats matter a lot. Where small filesizes are concerned, there is little harm in slinging around JSON objects …

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Structural Shift in the Economy

It's becoming a more or less accepted economic theory that a large part component of our current recession is structural. This means that during the housing bubble we had lots of people in housing related jobs (construction worker, realtor ), but once the bubble burst those jobs ceased to exist, and …

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