I believe I've seen these trend analyzed in other states as well (low and middle income earners have the most to gain by moving to lower cost of living states, so it's a common pattern).
https://www.sacbee.com/news/state/california/article13647809... https://lao.ca.gov/laoecontax/article/detail/265 http://www.latimes.com/business/la-fi-california-migration-2...
Perhaps you should clarify that this is true of legal in-migration. Wanna take any guesses as to how wealthy and educated the folks crossing over the border on a continual basis are?
Illegal immigration to Texas btw is much higher than to California: https://www.sacbee.com/site-services/databases/article174373...
Citation, or are you guessing? Which state has the most people migrating to it? To determine whether they are educated, the reason for the migration can help.
The fact that you've heard of it is entirely unrelated to the number of people it employs and in what capacity it employs them.
“Ever heard of X?” is an idiom that means something like “here’s an obvious example you should already know about.” It doesn’t imply that knowing about it proves something. It’s a perfectly fine argument that just says, “TI exists and attracts educated employees.”