Where Prices Come From: Menger Explains
Prices Reflect Exchange Ratios
Prices, as Menger points out in his Grundsätze, emerge as an accidental phenomenon. They are not the essence of economic activity. Prices are fortuitous insofar as they are the unintended result of an economic exchange that has subjective evaluations as its basis. Prices do not determine the exchange, but rather the individual exchange valuations determine the limits within which a negotiated price in terms of exchange ratios will be agreed upon.