There's an even bigger problem. There was no validation at all. It was based on self reporting which, in turn, was based on asking [ideally] random homeless ind

There's an even bigger problem. There was no validation at all. It was based on self reporting which, in turn, was based on asking [ideally] random homeless individuals, and then extrapolating that outward. There is an incentive for individuals to lie here if they believe that 'native' homeless might be subject to preferential treatment, or if reporting 'native' homeless increases could result in more favorable incentives for the homeless. And given how big of news homelessness and home price issues are in San Francisco, I think this motivation is a major concern. I am curious about the baselines here for other areas though. Even given the incentive to lie, the reported numbers given still seem quite high to me. The most liberal metric is living in the city for at least 10 years, which applied to just below 50% of the homeless. Even if we take the most conservative metric of 'migratory' patterns, with 30% of individuals having moved to San Francisco after becoming homeless, that still seems very high. But I don't really have a baseline for comparison in other major cities and search is not turning up any particularly great sources.