 Bayesian herd detection for dynamic dataJussi Keppo and Ville A. Satopää International Journal of Forecasting, 2024, vol. 40, issue 1, 285-301 Abstract: This article analyzes multiple agents who forecast an underlying dynamic state based on streams of (partially overlapping) information. Each agent minimizes a convex combination of their forecasting error and deviation from the other agents’ forecasts. As a result, the agents exhibit herding behavior, a bias well-recognized in the economics and psychology literature. Our first contribution is a general framework for analyzing agents’ forecasts under different levels of herding. The underlying state dynamics can be non-linear with seasonality, trends, shocks, or other time series components. Our second contribution describes how models within our framework can be estimated from data. We apply our estimation procedure to surveys of equity price forecasts and find that the agents concentrate 37% of their efforts on making similar forecasts on average. However, there is substantial variation in the level of herding over time; even though herding fell substantially during the 2007–2008 financial crisis, it rose after the crisis. Keywords: Bayesian statistics; Dynamic modeling; Gaussian process; Judgmental forecasting; Imperfect information game (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:intfor:v:40:y:2024:i:1:p:285-301 DOI: 10.1016/j.ijforecast.2023.03.001 Access Statistics for this article International Journal of Forecasting is currently edited by R. J. Hyndman More articles in International Journal of Forecasting from Elsevier |
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