Offline
Pretty nifty interactive map showing migration. Red lines are outbound, black lines are inbound. Just click on your county. Detroit and LA are almost solidly red. Enjoy...
http://www.forbes.com/2010/06/04/migration-moving-wealthy-interactive-counties-map.html
http://www.forbes.com/2010/06/04/migration-moving-wealthy-interactive-counties-map.html