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2017 Poincaré inequalities on intervals – application to sensitivity analysis
Olivier Roustant, Franck Barthe, Bertrand Iooss
Electron. J. Statist. 11(2): 3081-3119 (2017). DOI: 10.1214/17-EJS1310

Abstract

The development of global sensitivity analysis of numerical model outputs has recently raised new issues on 1-dimensional Poincaré inequalities. Typically two kinds of sensitivity indices are linked by a Poincaré type inequality, which provides upper bounds of the most interpretable index by using the other one, cheaper to compute. This allows performing a low-cost screening of unessential variables. The efficiency of this screening then highly depends on the accuracy of the upper bounds in Poincaré inequalities.

The novelty in the questions concern the wide range of probability distributions involved, which are often truncated on intervals. After providing an overview of the existing knowledge and techniques, we add some theory about Poincaré constants on intervals, with improvements for symmetric intervals. Then we exploit the spectral interpretation for computing exact value of Poincaré constants of any admissible distribution on a given interval. We give semi-analytical results for some frequent distributions (truncated exponential, triangular, truncated normal), and present a numerical method in the general case.

Finally, an application is made to a hydrological problem, showing the benefits of the new results in Poincaré inequalities to sensitivity analysis.

Citation

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Olivier Roustant. Franck Barthe. Bertrand Iooss. "Poincaré inequalities on intervals – application to sensitivity analysis." Electron. J. Statist. 11 (2) 3081 - 3119, 2017. https://doi.org/10.1214/17-EJS1310

Information

Received: 1 December 2016; Published: 2017
First available in Project Euclid: 25 August 2017

zbMATH: 06790054
MathSciNet: MR3694577
Digital Object Identifier: 10.1214/17-EJS1310

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Vol.11 • No. 2 • 2017
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