US Q2 GDP Growth Of "3.9%" Shows That We're Measuring It Wrong

``There's two important points to come out of this, one more important than the other. The less important one being that I wouldn't take any one quarter's GDP numbers very seriously just at the moment. There's, to my mind at least, something obviously wrong with the calculation system, something that needs to be sorted out. The more important one is that this all shows why the detailed planning of an economy just doesn't work. Quite simply because we don't have the information to enable us to do such detailed planning.''