“Migration continued to rise for the very most educated, while it fell for the very least educated,” Stone explains. “The highly educated are finding ways to keep moving to opportunity, while the less educated are more stuck in place.”

Over the past decade, the highly educated have become more mobile over long distances, while the less educated have remained stuck with no appreciable gains in their mobility. The mobility divide is no short-term thing: It is persistent over time and increasingly baked into our economic geography.