Homelessness is increasing across the country and has reached such alarming levels in parts of California that some cities have declared a state of emergency. According to the Hoover Institute, San Francisco has spent over $2.8 billion on homelessness, since 2016. A new study from the University of Notre Dame shows prevention efforts are successful.

For more, KCBS Radio's Liz Saint John spoke with David Phillips, a research professor in the Wilson Sheehan Lab for Economic Opportunities within Notre Dame's economics department.