She's been an Engineer (MIT), a Tiger (Princeton), and a Bear (Cal-Berkeley). Primarily a macroeconomist, her research focuses on the determinants of business cycles and the impact of fiscal and monetary policies.
Congratulations to Keyuan Gu for being the first to identify Christina Romer as the mystery economist. Dr. Romer, the outgoing Chair of the Council of Economic Advisors, is well known for her early research on the volatility of the economy before and after WWII. Her later research examined the impact of government spending and tax policies on the macroeconomy.