I saw this on Blessed Economist and thought it worth considering

Long gone are the days when economists thought deeply about how life actually works. Adam Smith, Adam Ferguson, Anne-Robert Turgot – the great "moral philosophers" – all died hundreds of years ago. Since then, the trade has gone bad. They're all numbers guys now. An economist, of the modern variety, is a statistician...an extrapolator...and a mountebank. If numbers go up two months in a row, he predicts they will go up another one. He rarely stops to ask whether his numbers really make any sense.

Bill Bonner on Bubble Deniers.