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首页> 外文期刊>Journal of Economic Dynamics and Control >Expectational stability of sunspot equilibria in non-convex economies
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Expectational stability of sunspot equilibria in non-convex economies

机译:非凸经济体中黑子平衡的预期稳定性

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摘要

We examine the stability under learning (E-stability) of sunspot equilibria in non-convex real business cycle models. The production technology is Cobb-Douglas with externalities generated by factor inputs. We establish that, with a general utility function, the well-known Benhabib-Farmer condition (Benhabib and Farmer, 1994) - that the labor-demand curve is upward-sloping and steeper than the Frisch labor-supply curve - is necessary for joint indeterminacy and E-stability. Then, with a separable utility function and allowing for negative externalities from capital inputs, we discover large regions in parameter space corresponding to stable indeterminacy, that is, learnable sunspot equilibria. These existence results overturn the conventional wisdom that sunspot equilibria in RBC-type models are inherently unstable, and provide concise closure to the stability puzzle of Evans and McGough (2005b).
机译:我们在非凸真实商业周期模型中研究了黑子平衡在学习(电子稳定性)下的稳定性。生产技术是Cobb-Douglas,其外部性由要素输入产生。我们建立了具有通用效用函数的著名的Benhabib-Farmer条件(Benhabib和Farmer,1994年),即劳动力需求曲线比Frisch劳动力供给曲线向上倾斜和陡峭,这对于联合不确定性和电子稳定性。然后,利用可分离的效用函数并考虑到资本投入的负外部性,我们在参数空间中发现了与稳定不确定性相对应的大区域,即可学习的黑子平衡。这些存在的结果推翻了传统的观点,即RBC型模型中的黑子平衡本质上是不稳定的,并为Evans和McGough(2005b)的稳定性难题提供了简洁的解决方案。

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