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Another Look at the Equity Risk Premium Puzzle

机译:再看股权风险溢价之谜

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摘要

The model of Mehra and Prescott (1985, J. Econometrics, 22, 145-161) implies that reasonable coefficients of risk-aversion of economic agents cannot explain the equity risk premium generated by financial markets. This discrepancy is hitherto regarded as a major financial puzzle. We propose an alternative model to explain the equity premium. For normally distributed returns and for returns far away from normality (but still light tailed), realistic equity risk premia do not imply puzzlingly high risk aversions. Following our approach, the equity premium puzzle' does not exist. We also consider fat-tailed return distributions and show that Pareto tails are incompatible with constant relative risk aversion.
机译:Mehra和Prescott的模型(1985,J. Econometrics,22,145-161)暗示,合理的经济主体风险规避系数无法解释金融市场产生的股权风险溢价。迄今为止,这种差异是一个主要的财务难题。我们提出了一种替代模型来解释股权溢价。对于正态分布的收益和远离正常值的收益(但仍为轻尾),现实的股权风险溢价并不意味着令人困惑的高风险厌恶情绪。按照我们的方法,股权溢价之谜不存在。我们还考虑了巨尾回报分布,并表明帕累托尾巴与恒定的相对风险规避是不相容的。

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