From The Atlantic:

In their book, Homelessness Is a Housing Problem, the University of Washington professor Gregg Colburn and the data scientist Clayton Page Aldern demonstrate that “the homelessness crisis in coastal cities cannot be explained by disproportionate levels of drug use, mental illness, or poverty.” Rather, the most relevant factors in the homelessness crisis are rent prices and vacancy rates.

Universal basic income would be a strong help with keeping people in homes. Better zoning and less reliance on cars would keep people in housing.1

  1. Read more from Strong Towns.