People tend to stay in a Florence even if they came for a specific job.
Contrast that to places where people do “a tour of duty” where they go and work there for a few years and then go back to wherever they were from. The original pull to a Florence may be the idea that someone was going to do a tour of duty but at some point that tour is extended more and more …
This raises the inevitable question:
What makes a Florence Sticky For People?