2019冠状病毒病期间分析师预测的准确性:之前的疫情经历重要吗?

Nishant Agarwal, Amna Chalwati
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引用次数: 0

摘要

目的:作者研究了分析师在COVID-19大流行期间对面临流行病的公司进行预测的先前经验对分析师预测准确性的作用。设计/方法/方法作者通过比较HRE与非HRE分析师从covid -19前时期(2019日历年)到covid -19后时期(直至2023年3月)的变化,研究了分析师先前的流行病经验对预测准确性的影响。作者考虑了一个完整样本(194,980)和一个子样本(136,836)的方法来区分“最近”的预测和“所有”的预测(包括修订)。研究结果表明,在COVID-19期间,HRE分析师的预测准确性明显高于非HRE分析师。具体而言,“近期”和“全部”预测样本的预测误差分别显著降低0.6%和0.15%。这一发现表明,分析师先前的流行病经验可以提高评估流行病不确定性的能力,从而转化为更高的预测准确性。研究局限/启示通过过去跟踪高风险公司的经验而发展的专业知识提高了分析师在大流行期间的表现,这一发现揭示了一个关键的差异,该差异部分解释了分析师之间表现的系统性差异。作者还表明,仅凭行业经验在提高大流行期间的预测准确性方面是没有用的——在大流行期间跟踪公司的先前经验会增加分析师在COVID-19等大流行期间预测的准确性。实际意义研究结果应促使国家一级的宏观经济决策者,如各国中央银行,在预测经济前景和做出与政策有关的决定时,将过去的流行病经验作为一个关键决定因素。此外,从业人员和咨询公司可以通过更多地重视具有过去流行病经验的分析师所做的经流行病调整的预测来改进盈利预测模型。新冠肺炎疫情引发的不确定性增加了全球金融市场的不确定性。在这种情况下,分析师作为信息中介的重要性变得更加重要。这就提出了一个问题,即在COVID-19大流行期间,是什么决定了分析师的预测准确性。基于先前关于分析师经验在形成分析师预测中的作用的文献,作者研究了跟踪经历过先前流行病的公司的经验是否允许分析师在COVID-19期间更准确地预测。作者们发现,在预测高疫情(H1N1、寨卡、埃博拉和SARS)风险公司方面有经验的分析师比缺乏此类经验的分析师表现出更高的准确性。此外,在对面临COVID-19风险较高的公司和事前信息环境较差的公司进行预测时,经验对预测准确性的影响更为明显。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analyst forecast accuracy during COVID-19: does prior epidemic experience matter?
PurposeThe authors examine the role of analysts’ prior experience of forecasting for firms exposed to epidemics on analysts’ forecast accuracy during the COVID-19 pandemic.Design/methodology/approachThe authors examine the impact of analysts’ prior epidemic experience on forecast accuracy by comparing the changes from the pre-COVID-19 period (calendar year 2019) to the post-COVID period extending up to March 2023 across HRE versus non-HRE analysts. The authors consider a full sample (194,980) and a sub-sample (136,836) approach to distinguish “Recent” forecasts from “All” forecasts (including revisions).FindingsThe study's findings reveal that forecast accuracy for HRE analysts is significantly higher than that for non-HRE analysts during COVID-19. Specifically, forecast errors significantly decrease by 0.6% and 0.15% for the “Recent” and “All” forecast samples, respectively. This finding suggests that analysts’ prior epidemic experience leads to an enhanced ability to assess the uncertainty around the epidemic, thereby translating to higher forecast accuracy.Research limitations/implicationsThe finding that the expertise developed through an experience of following high-risk firms in the past enhances analysts’ performance during the pandemic sheds light on a key differentiator that partially explains the systematic difference in performance across analysts. The authors also show that industry experience alone is not useful in improving forecast accuracy during a pandemic – prior experience of tracking firms during epidemics adds incremental accuracy to analysts’ forecasts during pandemics such as COVID-19.Practical implicationsThe study findings should prompt macroeconomic policymakers at the national level, such as the central banks of countries, to include past epidemic experiences as a key determinant when forecasting the economic outlook and making policy-related decisions. Moreover, practitioners and advisory firms can improve the earning prediction models by placing more weight on pandemic-adjusted forecasts made by analysts with past epidemic experience.Originality/valueThe uncertainty induced by the COVID-19 pandemic increases uncertainty in global financial markets. Under such circumstances, the importance of analysts’ role as information intermediaries gains even more importance. This raises the question of what determines analysts’ forecast accuracy during the COVID-19 pandemic. Building upon prior literature on the role of analyst experience in shaping analysts’ forecasts, the authors examine whether experience in tracking firms exposed to prior epidemics allows analysts to forecast more accurately during COVID-19. The authors find that analysts who have experience in forecasting for firms with high exposure to epidemics (H1N1, Zika, Ebola, and SARS) exhibit higher accuracy than analysts who lack such experience. Further, this effect of experience on forecast accuracy is more pronounced while forecasting for firms with higher exposure to the risk of COVID-19 and for firms with a poor ex-ante informational environment.
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