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关注这篇论文的作者
Timo Dimitriadis
Marius Puke

预测评分分解的统计推断

研究问题
如何将预测评分分解为失校准、区分能力与不确定性,并检验模型在哪个组成部分存在差异,而不只比较总体预测表现?
方法与思路
作者通过预测的线性再校准估计评分分解,兼容均值、分位数及非光滑评分函数,并构造组成部分相等的渐近检验。
材料陈述的贡献
摘要称,分解项在有限样本中非负,推断允许模型误设,并连接经典校准回归;通胀与金融风险预测应用展示额外信息。
阅读关注点
应核对线性化后校准和区分能力的定义、非光滑评分的推断条件,以及功效提升与金融回测结论适用的具体情形。
阅读边界
这是 arXiv 预印本,不能据此认定已同行评审或期刊接收;摘要未提供具体检验条件,线性再校准分解的解释范围仍需核对。

原文摘要

We introduce inference methods for score decompositions, which partition scoring functions for predictive assessment into three interpretable components: miscalibration, discrimination, and uncertainty. Our estimation and inference relies on a linear recalibration of the forecasts and is applicable to general point forecasts such as means and quantiles due to its validity for non-smooth scoring functions. This approach ensures non-negative decomposition terms in finite samples, enables asymptotic inference under model misspecification, and establishes a direct connection to the classical Mincer-Zarnowitz regression. The resulting inference framework facilitates novel tests for equal linearized forecast calibration or discrimination, which yield three key advantages. They enhance the information content of predictive ability tests by decomposing scores, can improve detection power in scenarios where predictive differences are attributable to specific score components, and formally connect scoring-function-based evaluation to traditional calibration tests, such as financial backtests. Applications demonstrate the method's utility. We find that for survey inflation forecasts, discrimination abilities can differ significantly even when overall predictive ability does not. In an application to financial risk models, our tests provide deeper insights into the calibration and information content of volatility and Value-at-Risk forecasts. By disentangling forecast accuracy from backtest performance, the method exposes critical shortcomings in current banking regulation.

笔记与分组