If an economist uses a complicated model to predict just about anything, you can ignore it. By analogy, a doctor can't tell you the exact date of your death in 50 years. But if a doctor tells you to eat less and exercise more, that's good advice even if you later get hit by a bus. Along those same lines, economists can give useful general advice on the economy, even if you know there will be surprises. Still, be skeptical.

Press release, 10 September 2008