Part of the significance of the performativity of economics arises from the fact that individual human beings tend to have quite limited powers of memory, information-processing, and calculation." Those limitations explain the centrality especially in complex markets of simplifying concepts (e.g., "implied volatility") and of material means of calculation (e.g., Black's sheets and the Chicago Board Options Exchange's Autoquote system).

Donald MacKenzie, An Engine, Not a Camera, loc. 1195