<i>San Francisco is an outlier given the extremely dense concentration of high paying jobs which drove housing into orbit</i><p>San Francisco&#x27;s housing policies drove housing into orbit: <a href="http:&#x2F;&#x2F;techcrunch.com&#x2F;2014&#x2F;04&#x2F;14&#x2F;sf-housing&#x2F;" rel="nofollow">http:&#x2F;&#x2F;techcrunch.com&#x2F;2014&#x2F;04&#x2F;14&#x2F;sf-housing&#x2F;</a>. There are numerous other discussions of this: <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;TheRent-Too-Damn-High-Matters-ebook&#x2F;dp&#x2F;B0078XGJXO?ie=UTF8&amp;tag=thstsst-20&amp;linkCode=as2&amp;camp=1789&amp;creative=390957" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;TheRent-Too-Damn-High-Matters-ebook&#x2F;dp...</a>.<p>We have the technology to build lots of units (steel-frame construction, elevators): <a href="http:&#x2F;&#x2F;www.slate.com&#x2F;blogs&#x2F;moneybox&#x2F;2013&#x2F;05&#x2F;03&#x2F;silicon_valley_housing_boom_there_s_no_such_thing.html" rel="nofollow">http:&#x2F;&#x2F;www.slate.com&#x2F;blogs&#x2F;moneybox&#x2F;2013&#x2F;05&#x2F;03&#x2F;silicon_valle...</a>. &quot;We&quot; just choose not to use them.