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arXiv 2102.00577stat.AP
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使用一致性评分函数评估极端事件的点预测

Evaluation of point forecasts for extreme events using consistent scoring functions

Robert J. Taggart

摘要:

我们提出了一种方法,用于比较点预测的兴趣区域,如尾部或中心的变量的范围。与有条件地选择要评估的事件,然后使用在事件选择之前一致(或适当)的评分函数相比,这种方法不能被对冲。我们的方法还给出了评分函数的分解,这些函数对于平均值或特定分位数或期望值是一致的。每个分解的每个成员本身就是一个一致的评分函数,强调变量范围的选定区域的性能。分解的每个成员的得分具有植根于最优决策理论的自然解释。它是用户决策阈值上的经济遗憾的加权平均值,其中权重强调相应感兴趣区域中的那些决策阈值。

英文摘要:

We present a method for comparing point forecasts in a region of interest, such as the tails or centre of a variable's range. This method cannot be hedged, in contrast to conditionally selecting events to evaluate and then using a scoring function that would have been consistent (or proper) prior to event selection. Our method also gives decompositions of scoring functions that are consistent for the mean or a particular quantile or expectile. Each member of each decomposition is itself a consistent scoring function that emphasises performance over a selected region of the variable's range. The score of each member of the decomposition has a natural interpretation rooted in optimal decision theory. It is the weighted average of economic regret over user decision thresholds, where the weight emphasises those decision thresholds in the corresponding region of interest.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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