This is a fascinating study by Issi Romem about the characteristics of cross-metropolitan migration in the United States. The key findings are that in-migrants to expensive coastal cities tend to have higher incomes and more education than the out-migrants, and that the opposite is true for the less expensive cities in the US. “Expensive” means expensive housing.

Here is the income chart:

Let’s use San Francisco as the example since it’s the most expensive metro (all the way to the right on the x-axis). The way to read this is that on average, from 2005 to 2016, in-migrants to the San Francisco metro area earned $12,640 a year more per household (y-axis) after they arrived compared to out-migrants before they left. This chart shows the difference between in and out incomes.