> And 2/3rds of the US population lives in 3.5% of the land area, what do you expect? Per the article, it's more than just that, unsurprisingly. "A large popu

> And 2/3rds of the US population lives in 3.5% of the land area, what do you expect? Per the article, it's more than just that, unsurprisingly. "A large population and workforce is only part of the story. Last year, these counties represented $1.3 trillion more of nationwide GDP than the share of workers alone would account for. Looking at population, their combined share of GDP rose even as their share of overall population fell. The difference may stem from other aspects of a city, such as clusters of activity or networks, that improve productivity."