Introduction -- First impressions -- Trading robots and social cues -- Animating the market -- Models and reflexivity -- Managers -- Performative spirals -- Norms -- Resonance -- The global financial crisis -- Scandal -- When all is said and done -- Conclusion.

We compare sparse and dense representations of predictive models in macroeconomics, microeconomics, and finance. To deal with a large number of possible predictors, we specify a prior that allows for both variable selection and shrinkage. The posterior distribution does not typically concentrate...