Silicon Valley’s latest tech boom, combined with a housing shortage, has caused rents to soar over the last five years. The city’s rents, by one measure, are now the highest in the world. The prohibitive costs have displaced teachers, city workers, firefighters and other members of the middle class, not to mention low-income residents. Now techies, many of whom are among the highest 1% of earners, are complaining that they, too, are being priced out. More: