Economists' error

"The economist knows that a single error in his field may do more harm than almost all the sciences taken together can do good--even more, that a mistake in the choice of a social order, quite apart from the immediate effect, may profoundly affect the prospects for generations."
F. A. v. Hayek
http://www.mises.org/store/Trend-of-Economic-Thinking-The-P587.aspx