经济学家是否有更强的预测能力?

Ritong Qu, A. Timmermann, Yinchu Zhu
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引用次数: 4

摘要

为了回答这个问题,我们开发了新的测试方法,用于在任意多个预测者、结果变量和时间段的设置中识别卓越的预测技能。我们的方法允许我们解决是否有任何经济学家对任何变量或任何时间点具有卓越的预测技能,同时仔细控制“运气”的作用,因为运气在评估大量预测时可能会导致错误的发现。我们提出了新的假设和测试统计,可以用来识别预测性能的专家,通才和事件特定技能。我们将新方法应用于彭博社(Bloomberg)对美国经济数据的大量调查预测,结果显示,总体而言,几乎没有证据表明,任何一个预测者都能超过同行预测的简单等加权平均值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Do Any Economists Have Superior Forecasting Skills?
To answer this question, we develop new testing methods for identifying superior forecasting skills in settings with arbitrarily many forecasters, outcome variables, and time periods. Our methods allow us to address if any economists had superior forecasting skills for any variables or at any point in time while carefully controlling for the role of "luck" which can give rise to false discoveries when large numbers of forecasts are evaluated. We propose new hypotheses and test statistics that can be used to identify specialist, generalist, and event-specific skills in forecasting performance. We apply our new methods to a large set of Bloomberg survey forecasts of US economic data show that, overall, there is very little evidence that any individual forecasters can beat a simple equal-weighted average of peer forecasts.
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