If you read the full article, it has a lot more information, particularly about the things which seem to not influence the wage increase in this area.(Not government spending, for example) However, I'm curious how the wage increase would track with the increase in positions which require a security clearance. Those have been rising rapidly since 2001, they are heavily concentrated in this area, and there is usually a higher wage associated with those as well. That could easily be a contributing factor to the disparity in the wage increase in this area compared to other metro areas.