The Public Policy Institute of California, a think tank that conducts vigorous and objective research into vital state issues, is celebrating its 30th anniversary with a series of retrospective reports. Housing, or the chronic lack thereof, is arguably the most important of those issues, since it lies at the core of so many of California’s existential challenges. They include the nation’s highest levels of homelessness and poverty, a yawning gap in generational wealth, and the outflow of people and jobs to other states with more abundant and less expensive housing. Unfortunately, Public Policy Institute researchers Hans Johnson and Eric McGhee could find little progress over the past three decades, writing, “While California’s housing market has undergone tremendous changes over the years, with some aspects worsening in the last decade, the central problem — high housing costs — remains the same. “As California’s population has increased, more housing units have been built — yet housing costs and rent increases have outpaced building,” they add. Since 1990 the state has added 3.6 million homes, up 33%, and 9.4 million residents, up 31% as of last January. California’s median