It seems that one can write even a master's degree on this topic:
The “Google shuttle effect:” Gentrification and San Francisco’s dot com boom 2.0
http://svenworld.com/wp-content/uploads/2014/01/Goldman_PRFi...
The “Google shuttle effect:” Gentrification and San Francisco’s dot com boom 2.0
http://svenworld.com/wp-content/uploads/2014/01/Goldman_PRFi...
I was especially offended by the misuse of "externality" in the first page: "Lower income people should not bear the brunt of the negative externalities of economic development" (she is referring to housing prices, which are not an exernality).