Assessing the calibration of multi-horizon, probabilistic forecasts

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• Christopher Ferro (University of Exeter)
• Tuesday 03 June 2025, 14:00-15:00
• Seminar Room 1, Newton Institute.

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RCLW02 - Calibrating prediction uncertainty : statistics and machine learning perspectives

We propose a new method for assessing calibration based on revisions of probabilistic forecasts. Such revisions refer to how forecasts for an outcome change as the forecasts are updated over time. We begin by extending the definition of a forecast revision from point forecasts to probabilistic forecasts. Then we show that if the forecasts are well calibrated (efficient) then the revisions form a sequence of independent uniform random variables. This motivates new statistical tests to detect miscalibration.

This talk is part of the Isaac Newton Institute Seminar Series series.

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