Chow Hwee Kwan, Choy Keen Meng
School of Economics, Singapore Management University, 90 Stamford Road, Singapore, 178903 Singapore.
Faculty of Economics, Soka University, 1-236 Tangi-cho, Hachioji-shi, Tokyo 192-8577 Japan.
Empir Econ. 2023;64(5):2105-2124. doi: 10.1007/s00181-022-02311-8. Epub 2022 Oct 21.
This paper aims to investigate whether the predictive performance and behaviour of professional forecasters are different during the COVID-19 pandemic as compared with the global financial crisis of 2008 and normal times. To this end, we use a survey of professional forecasters in Singapore collated by the central bank to analyse the forecasting records for GDP growth and CPI inflation for the period 2000Q1-2021Q4. We first examine the point forecasts to document the extent of forecast failure during the two crises and explore various explanations for it, such as leader-following and herding behaviour. Then, using percentile-based summary measures of probability distribution forecasts, we study how the degree of consensus and extent of subjective uncertainty among forecasters were affected by crisis conditions. A trend break is observed in the subjective uncertainty associated with growth projections after the onset of the COVID-19 crisis. In contrast, both subjective uncertainty and the degree of consensus in inflation projections were essentially unchanged in crises, suggesting that the short-term inflation expectations of forecasters were strongly anchored.
本文旨在研究与2008年全球金融危机及正常时期相比,专业预测者在新冠疫情期间的预测表现和行为是否有所不同。为此,我们利用新加坡央行整理的对专业预测者的调查,分析了2000年第一季度至2021年第四季度期间国内生产总值(GDP)增长和消费者物价指数(CPI)通胀的预测记录。我们首先考察点预测,以记录两次危机期间预测失误的程度,并探究其各种解释,如追随领导者和羊群行为。然后,我们使用基于百分位数的概率分布预测汇总指标,研究危机状况如何影响预测者之间的共识程度和主观不确定性程度。在新冠疫情危机爆发后,与增长预测相关的主观不确定性出现了趋势断点。相比之下,通胀预测中的主观不确定性和共识程度在危机期间基本未变,这表明预测者的短期通胀预期具有较强的锚定作用。