Most Stable Home Prices
(S&P/Case-Shiller Home Price Index, sample of cities: Jan 2009 - Sept 2011)
Most Educated Cities
(S&P/Case-Shiller Home Price Index, sample of cities: Jan 2009 - Sept 2011)
Most Educated Cities
(% of adults 25+ with a bachelor's degree, 2008. - Brookings analysis)

Fastest Growing States
(% growth between 2010 and 2011 - Census)

The flip side of the it's-all-about-government argument is that Washington has the most important ingredient to a successful city: smarts. Nearly half the adults in the D.C. area have at least a bachelor's degree. Across the country, the cities with the highest share of college degrees correlate highly with the richest cities in the country. San Jose, the third most-educated city (see chart above), is the second richest. Raleigh-Durham, the sixth most-educated metro area, has the highest ratio of wages-to-income in the country, according to analysis from Richard Florida. And I don't need to tell you that San Francisco, Bridgeport, and Boston have plenty of rich people to spare.
To be fair, this introduces a bit of a chicken-egg dilemma. A group of smart people attract more smart people, but where does it start? In D.C., much of it starts with the federal government. Many highly educated people come to D.C. and Arlington and Bethesda precisely because the government was there first. The NIH needs Washington's health care investment budget. Communications law firms need the FCC. Politico needs politicos. Lobbyists need electeds to lobby. You get the point.
The under-reported aspect of Washington, D.C.'s economic dominance is that we are catching up to the recession a little late. Between April and October, the number of employed people in the District dropped by 9,000, according to the Federal Reserve Bank of Richmond, the worst five-month span in D.C. since before the recession. This period of moderate decline comes, not coincidentally, during a season of budget-cutting (or stimulus-pausing) on Capitol Hill. Does the entire District economy rise and fall on the momentum of government spending? Probably not. And yet, what happens on Capitol Hill has a habit of winding up on not just K Street, but every street, from A through W and into the suburbs.
Update: The push-back against the "fastest-growing" superlative is well taken. The comparison is to states, not cities, and states are not made up entirely of metropolitan areas, so the idea that D.C. is growing faster than, say, Georgia, loses some salience.
This article available online at:
http://www.theatlantic.com/business/archive/2011/12/washington-dc-the-nations-fastest-growing-top-earning-best-educated-city/250406/