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Scoring probabilistic forecasts: the importance of being proper

Bröcker, Jochen and Smith, Leonard A. (2007) Scoring probabilistic forecasts: the importance of being proper. Weather and Forecasting, 22 (2). pp. 382-388. ISSN 0882-8156

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Abstract

Questions remain regarding how the skill of operational probabilistic forecasts is most usefully evaluated or compared, even though probability forecasts have been a long-standing aim in meteorological forecasting. This paper explains the importance of employing proper scores when selecting between the various measures of forecast skill. It is demonstrated that only proper scores provide internally consistent evaluations of probability forecasts, justifying the focus on proper scores independent of any attempt to influence the behavior of a forecaster. Another property of scores (i.e., locality) is discussed. Several scores are examined in this light. There is, effectively, only one proper, local score for probability forecasts of a continuous variable. It is also noted that operational needs of weather forecasts suggest that the current concept of a score may be too narrow; a possible generalization is motivated and discussed in the context of propriety and locality.

Item Type: Article
Official URL: http://www.ametsoc.org/pubs/journals/waf/index.htm...
Additional Information: © 2007 American Meteorological Society
Library of Congress subject classification: Q Science > Q Science (General)
G Geography. Anthropology. Recreation > GE Environmental Sciences
Sets: Research centres and groups > Centre for the Analysis of Time Series (CATS)
Departments > Statistics
Rights: http://www.lse.ac.uk/library/usingTheLibrary/academicSupport/OA/depositYourResearch.aspx
Date Deposited: 26 Jan 2009 11:52
URL: http://eprints.lse.ac.uk/22219/

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