"There’s a school of thought at that net domestic migration is the primary statistic of urban health. I believe I’ve even said something of the sort myself. In this logic, people are “voting with their feet” about which cities and states are implementing the best policies."
"Of course, this creates a challenge for urbanists because the migration data is all away from major dense urban cores towards the South and various Sprawlville, USA’s. Hence when these numbers are thrown in their faces, they dismiss or discount them."