Unverified50% confidenceCautionExact time
使用GDP最终修订值而非初始公布值进行回测会系统性地高估模型的预测能力，构成前视偏差
1
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50%
Confidence
Long-term
Relevance
8/12/2026
First Seen
Sources
金融机器学习模型为何难以评估？核心挑战与避坑指南
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