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Does Belief Heterogeneity Explain Asset Prices: The Case of the Longshot Bias

机译:信念异质性能否解释资产价格:长期偏差的案例

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This article studies belief heterogeneity in a benchmark competitive asset market: a market for Arrow-Debreu securities. We show that differences in agents' beliefs lead to a systematic pricing pattern, the favourite-longshot bias (FLB): securities with a low-pay-out probability are overpriced, whereas securities with high probability pay-out are underpriced. We apply demand estimation techniques to betting market data, and find that the observed FLB is explained by a two-type population consisting of canonical traders, who hold virtually correct beliefs and are the majority type in the population (70%); and noise traders exhibiting significant belief dispersion. Furthermore, exploiting variation in public information across markets in our data set, we show that our belief heterogeneity model empirically outperforms existing preference-based explanations of the FLB.
机译:本文研究基准竞争资产市场中的信念异质性:Arrow-Debreu证券市场。我们发现,代理人信念的差异会导致系统的定价模式,即偏爱远景偏向(FLB):低支付概率的证券定价过高,而高支付概率的证券定价过低。我们将需求估计技术应用于博彩市场数据,发现观察到的FLB是由两种类型的人口解释的,该两种人口由规范的交易者组成,他们实际上持有正确的信念,并且是人口中的多数类型(70%);和噪声交易者表现出明显的信念分散。此外,利用我们数据集中各个市场上公共信息的变化,我们表明,我们的信念异质性模型从经验上优于现有的基于FLB的基于偏好的解释。

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