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Black Box Variational Bayesian Model Averaging

Author

Listed:
  • Vojtech Kejzlar
  • Shrijita Bhattacharya
  • Mookyong Son
  • Tapabrata Maiti

Abstract

For many decades now, Bayesian Model Averaging (BMA) has been a popular framework to systematically account for model uncertainty that arises in situations when multiple competing models are available to describe the same or similar physical process. The implementation of this framework, however, comes with a multitude of practical challenges including posterior approximation via Markov chain Monte Carlo and numerical integration. We present a Variational Bayesian Inference approach to BMA as a viable alternative to the standard solutions which avoids many of the aforementioned pitfalls. The proposed method is “black box” in the sense that it can be readily applied to many models with little to no model-specific derivation. We illustrate the utility of our variational approach on a suite of examples and discuss all the necessary implementation details. Fully documented Python code with all the examples is provided as well.

Suggested Citation

  • Vojtech Kejzlar & Shrijita Bhattacharya & Mookyong Son & Tapabrata Maiti, 2023. "Black Box Variational Bayesian Model Averaging," The American Statistician, Taylor & Francis Journals, vol. 77(1), pages 85-96, January.
    • Handle: RePEc:taf:amstat:v:77:y:2023:i:1:p:85-96
    DOI: 10.1080/00031305.2022.2058611
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