This interactive map is amazing: click a US county and it shows you were people who live their move to, and from where people are moving into this area. This is a (very cool) tool, but some serious DIY analysis is required to tell the story though.
I clicked around a bit and discovered some patterns:
- Lots of people are moving back and forth between big cities
- In the mid west, people move within a short radius
- Upper east coast people move (retire?) to Florida