
The New York Times has a recent article up talking about the disappearing “urban advantage” for low-skilled workers. It is based on the work of MIT economist David Autor.
Here is a chart from the article plotting wages against population density from 1950 to 2015:

The clear takeaway is that dense urban centers remain a place where wealth is created – but you probably need a college degree.
The economic advantages of dense cities for those without one appears to be disappearing. The labor market has diverged.