Research Publication

We use decision theory to confront uncertainty that is sufficiently broad to incorporate models as approximations. “We presume the existence of a featured collection of what we call structured models that have explicit substantive motivations. The decision maker confronts uncertainty through the lens of these models, but also views these models as simplifications, and hence, as misspecified. We extend the max-min analysis under model ambiguity to incorporate the uncertainty induced by acknowledging that the models used in decision-making are simplified approximations. Formally, we provide an axiomatic rationale for a decision criterion that incorporates model misspecification concerns. We then extend our analysis beyond the max-min case allowing for a more general criterion that encompasses a Bayesian formulation.

JEL codes- C54, D81

Online Appendix 

Forthcoming in the Review of Economic Studies 

This research received the Best Paper Award at the 1st MUSEES Conference, as presented by my co-author, Fabio Maccheroni. 

@article{cerreia2020making,
  title={Making decisions under model misspecification},
  author={Cerreia-Vioglio, Simone and Hansen, Lars Peter and Maccheroni, Fabio and Marinacci, Massimo},
  journal={University of Chicago, Becker Friedman Institute for Economics Working Paper},
  number={2020-103},
  year={2020}
}