[spoonjim]

What data would you look for to confirm the claim, and what data would you loom for to reject the claim?

[angst_ridden]

Well, something stronger than "everyone knows this."

It's a notoriously difficult thing to study, but you can get some answers by looking at tangential studies to see correlation between housing prices and homelessness, e.g., https://www.latimes.com/business/la-fi-ucla-anderson-forecas... or studies showing a majority of the unhoused in California worked here before becoming homeless https://www.capolicylab.org/employment-among-la-county-resid...