A federal look at home prices from 2006 to 2011 in the booming U.S. oil patch found a tie between appreciation and places with lots of energy jobs, which probably was no real surprise.

In Oklahoma, having more energy jobs also meant gains in home values — but not as much as in counties with fewer energy jobs, which might seem puzzling.

That's at least partly because of how an energy job and a high-energy county were defined in the study.

Low-energy Tulsa?