My recent repost of an article on Columbus, Ohio’s brand blew away the all time comment record for this blog, with 271 as of this writing.
One the discussions was around the extent to which Columbus and other Ohio cities draw mostly from the state or from a broader area. Obviously with Ohio State University, Columbus has a massive in-state draw. But what about people from out of state?
To try quantify this, I used the IRS migration data in my Telestrian system to sort out net migration into that which is with the state of Ohio, and that which is with other states. Before the data, a couple caveats. First, this is based on tax return data so probably understates student movements as many (most?) undergrads aren’t filing their own returns. Second, for multi-state metros like Cincinnati, someone moving from Ohio to the Kentucky or Indiana part of the metro area still counts in the total. The metro area is considered a unit. Also, movements within the metro area are ignored. With that, here’s the chart (click to enlarge):
As expected, Columbus has a huge in-state draw. But what surprised me is that Columbus actually has negative migration with the rest of the country. In effect, Columbus gains people from Ohio and exports them to the rest of the country. I’m sure the university has something to do with this, but it’s interesting nevertheless. Cincinnati shows the same pattern, only at a smaller scale. And Cleveland is bleeding people both to Ohio and the rest of the country. Keep in mind with Cleveland that a lot of the in-state outmigration is probably in effect suburban because of the nature of the way Northeast Ohio metros are set up.
To put this in perspective, I ran the same analysis for various other similar sized metros:
This was a shocker to me. Look at Nashville and Charlotte. It’s not so much that they have large net migration from out of state, but that they have very low net migration from inside. Though Nashville is the boomtown of Tennessee, it seems not to be sucking in people from the rest of the state.
Portland is also an interesting case. It appears to be like Nashville and Charlotte, but what this doesn’t show is that overwhelmingly the net migration to Portland is coming from California – 53,000 people worth. If you exclude both Oregon and California, Portland only drew a net of 21,000 people from the rest of the country. Contrary to what you might think, vast quantities of people (on a net basis) are not streaming into Portland from all over the country. It’s a regional draw.
Austin parallels Columbus a bit in that it has a huge in-state draw, possibly again because of the university. It also as a huge migration with California – 30,000 people. If you look at Texas plus California, that’s about half the total. Charlotte has a similar effect with New York and New Jersey migration.
Indianapolis is sort of a control with Columbus. It is primarily an in-state draw but does have a positive balance with the rest of the country. Keep in mind that it will inevitably lose some people to Sunbelt states for retirement. There’s not much you can do about that. But it’s an effect say North Carolina may have less of. The contrast with Columbus in out of state migration could be due to the lack of a major school there. I don’t know for sure.
Looking more closely at the 3C’s, here is their net migration with each other:
And here is the gross migration, which is the total number of people moving back and forth:
And here’s the percentage of metro area population that is living in the state they were born in:
There’s no radical difference. In fact, by my eyeball calculation, the difference between Columbus and Cleveland is almost entirely due to the former’s higher percentage of foreign born residents (again, partially an artifact of OSU). In their domestic population they are similar. Cincinnati is in the corner of the state and a three state metro. It’s easy to see that its born in state of residence figure is lower because of people who crossed a state line while not leaving the region, though I can’t quantify the exact figures.