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Penalising Model Component Complexity: A Principled, Practical Approach to Constructing Priors

Open access
Simpson, Daniel, Rue, Håvard, Riebler, Andrea, Martins, Thiago G., Sørbye, Sigrunn H.·2017·Statistical Science

Abstract

In this paper, we introduce a new concept for constructing prior distributions. We exploit the natural nested structure inherent to many model components, which defines the model component to be a flexible extension of a base model. Proper priors are defined to penalise the complexity induced by deviating from the simpler base model and are formulated after the input of a user-defined scaling parameter for that model component, both in the univariate and the multivariate case. These priors are invariant to reparameterisations, have a natural connection to Jeffreys’ priors, are designed to support Occam’s razor and seem to have excellent robustness properties, all which are highly desirable and allow us to use this approach to define default prior distributions. Through examples and theoretical results, we demonstrate the appropriateness of this approach and how it can be applied in various situations.

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Metadata

Authors
Simpson, D., Rue, H., Riebler, A., Martins, T. G., & Sørbye, S. H.
Venue
Statistical Science
Published
2017-02-01
Volume
32
Issue
1
Pages
1-28
ISSN
0883-4237 (ISSN-L)
OpenAlex
W1487139063
Cited by
1,085
References
83
FWCI
56.16
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Penalising Model Component Complexity: A Principled, Practical Approach to Constructing Priors. https://app.cochat.ai/papers/10.1214/16-sts576
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Simpson, D., Rue, H., Riebler, A., Martins, T. G., & Sørbye, S. H. (2017). Penalising Model Component Complexity: A Principled, Practical Approach to Constructing Priors. Statistical Science. https://doi.org/10.1214/16-sts576

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.