The Money is to the North

The (reconstructed) interior of the garage where Hewlett and Packard got started in the late 1930s.

Here's the county average weekly wage, 4th quarter, 2013.  The Silicon Valley influence is evident.

San Mateo $2724
Santa Clara $1972
San Francisco $1973
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Los Angeles $1161

Source: http://www.bls.gov/news.release/cewqtr.t01.htm