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News shocks and asset price volatility in general equilibrium

机译:总体均衡情况下的新闻冲击和资产价格波动

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We study equity price volatility in general equilibrium with news shocks about future productivity and monetary policy. As West (1988) shows, in a partial equilibrium present discounted value model, news about the future cash flow reduces asset price volatility. We show that introducing news shocks in a canonical dynamic stochastic general equilibrium model may not reduce asset price volatility under plausible parameter assumptions. This is because, in general equilibrium, the asset cash flow itself may be affected by the introduction of news shocks. In addition, we show that neglecting to account for policy news shocks (e.g., policy announcements) can potentially bias empirical estimates of the impact of monetary policy shocks on asset prices.
机译:我们在一般均衡的情况下研究股票价格的波动性,并对未来的生产率和货币政策产生新闻冲击。正如West(1988)所示,在部分均衡的现值折现模型中,有关未来现金流量的消息减少了资产价格的波动性。我们表明,在合理的参数假设下,在规范的动态随机一般均衡模型中引入新闻冲击可能不会降低资产价格的波动性。这是因为,在一般均衡下,资产现金流量本身可能会受到新闻冲击的影响。此外,我们表明,忽略考虑政策新闻冲击(例如政策公告)可能会使货币政策冲击对资产价格的影响的经验估计产生偏差。

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