Sonja Trauss, founded the SFBay Area Renters Federation , the Metro Observer and co-founded the YIMBY Party and CA Renters Legal Advocacy to advance the cause of building housing. San Francisco, and California are experiencing a housing shortage. Housing shortage is bad for renters (and good for homeowners, incidentally). High prices are a symptom of the underlying shortage. The typical solutions have focused on fixing the price of housing, but allowing the shortage to worsen.