It doesn&#x27;t matter what and how they calculated, because your preferences and valuations are not externally determinable.<p>For example, there&#x27;s no way to calculate how much you&#x27;ll be willing to pay for a can of cola tomorrow at 17:56, but your decision to buy one (or not) will factor into the economy as a whole.<p>If you buy a cola at noon, that results in a different state for the whole economy than would have resulted from you buying it at 17:56, and so on.<p>An economy is an aggregate of all the individual choices that factor into it, and all of those choices are based on people&#x27;s individual preferences and therefore incalculable.<p>This is why all of mainstream economics is at best misguided nonsense and academic mental masturbation.<p>In reality, of course, its real purpose is to serve justifications for government intervention in our lives - it&#x27;s not like Austrian Economics is some arcane knowledge that&#x27;s only available to a handful of insiders somewhere. You can go to <a href="http:&#x2F;&#x2F;mises.org" rel="nofollow">http:&#x2F;&#x2F;mises.org</a> and learn to understand how economics <i>really</i> works.