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Published online by Cambridge University Press: 01 April 2022
In the curve fitting problem two conflicting desiderata, simplicity and goodness-of-fit, pull in opposite directions. To this problem, we propose a solution that strikes a balance between simplicity and goodness-of-fit. Using Bayes’ theorem we argue that the notion of prior probability represents a measurement of simplicity of a theory, whereas the notion of likelihood represents the theory’s goodness-of-fit. We justify the use of prior probability and show how to calculate the likelihood of a family of curves. We diagnose the relationship between simplicity of a theory and its predictive accuracy.
Department of Philosophy, Montana State University, Bozeman, MT 59717.
Department of Mathematical Sciences, Montana State University, Bozeman, MT 59717.
Simon School of Business and Management, University of Rochester, Rochester, NY 14627.