The strong, Barnesian sense of "performativity," in which the use of a model (or some other aspect of economics) makes it "more true," raises the possibility of its converse: that the effect of the practical use of a theory or model may be to alter economic processes so that they conform less well to the theory or model. Let me call this possibility which is not explicit in Gallon's work "counterperformativity." An aspect of economics is being used in "realworld" processes, and the use is having effects, but among those effects is that economic processes are being altered in such a way that the empirical accuracy of the aspect of economics in question is undermined.

Donald MacKenzie, An Engine, Not a Camera, loc. 92