How Flexible is that Functional Form? Quantifying the Restrictiveness of Theories

Drew Fudenberg, Wayne Gao and Annie Liang

Papers from arXiv.org

Abstract: We propose a restrictiveness measure for economic models based on how well they fit synthetic data from a pre-defined class. This measure, together with a measure for how well the model fits real data, outlines a Pareto frontier, where models that rule out more regularities, yet capture the regularities that are present in real data, are preferred. To illustrate our approach, we evaluate the restrictiveness of popular models in two laboratory settings -- certainty equivalents and initial play -- and in one field setting -- takeup of microfinance in Indian villages. The restrictiveness measure reveals new insights about each of the models, including that some economic models with only a few parameters are very flexible.

Date: 2020-07, Revised 2023-08
New Economics Papers: this item is included in nep-upt
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