I mean it could be both right? See this: https://www.genesisrecovery.com/drug-addiction-and-homelessness-in-california/ https://www.genesisrecovery.com/drug-ad

I mean it could be both right? See this: https://www.genesisrecovery.com/drug-addiction-and-homelessness-in-california/ https://www.genesisrecovery.com/drug-addiction-and-homelessn... One thing about both the studies you reference and studies I reference is that they're both correlative. Not causative. A causative study is virtually impossible here. One possible causal chain: Drug use leads to less money, leads to no house in high cost areas. Another possible chain: No money, leads to no house in high cost areas, leads to drug use. There's actually infinite possibilities because the causal source can come from an unknown variable that we didn't reference here. My best guess though is that it's both.