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Returns-to-scale and the equity premium puzzle

机译:规模收益与股权溢价之谜

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摘要

A model of heterogenous firms facing idiosyncratic risk is proposed which generates an equity premium of 6 per cent and a risk-free rate of 1.5 per cent even if aggregate returns are risk-free. The premium in this model reflects diminishing returns-to-scale and the fact that equity shares are equal claims to firm output. In the bond market, the risk-free rate reflects trade in assets at marginal rates of return with a linear technology and thus the equity premium in excess returns reflects a comparison of average returns with marginal returns. In the model, credit constraints lower the equity premium and, absent such constraints, the equity premium would roughly double. Since the model may be interpreted as a model of entrepreneurship, this paper also presents estimates from a structural model of entrepreneurship using data from the Survey of Consumer Finances and also finds only a modest level of risk aversion is sufficient to replicate entrepreneurial returns.
机译:提出了一个面临异质风险的异类公司模型,即使总收益是无风险的,该模型也会产生6%的股权溢价和1.5%的无风险率。该模型中的溢价反映了规模收益的递减,以及股权与公司产出相等的事实。在债券市场中,无风险利率反映了采用线性技术以边际收益率进行的资产交易,因此超额收益中的股票溢价反映了平均收益与边际收益的比较。在该模型中,信贷约束降低了股权溢价,如果没有这种约束,股权溢价将大约翻倍。由于该模型可能被解释为企业家精神的模型,因此本文还使用《消费者金融调查》的数据提出了企业家精神结构模型的估计值,并且还发现仅适度的风险规避水平足以复制企业家的回报。

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