Well if you are going for the obvious reasons, I guess the insane amount of tech related investment and subsequently generated wealth plays significant role in

Well if you are going for the obvious reasons, I guess the insane amount of tech related investment and subsequently generated wealth plays significant role in this but what people quite often forget is the local government. I would recommend everybody to talk to a builder here in SF and get their stories. It is quite eye opening. The local government puts roadblocks to new developments claiming that it would destroy the original look of the city, yet there are areas where this is not an issue. Look around in the business district. On the top of that it plays the different sides against each other, tells to people that the gentrification is purely caused by tech workers. I need to look into Miami more but I guess there is less tech investment and there are no roadblocks against housing projects. More here: http://techcrunch.com/2014/04/14/sf-housing/ http://techcrunch.com/2014/04/14/sf-housing/