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Thomas Piketty and the rate of time preference

机译:Thomas Piketty和时间偏好率

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Using a standard model in which the individual consumption path is computed solving an optimal control problem, we investigate central claims of Piketty (2014). Rather than r > g (confirmed in the data) r - rho > g - with rho being the rate of time preference - matters. If this condition holds and the elasticity of substitution in the production function is larger than one, the capital share converges to one in the long run. Nevertheless, this does not have major impact on the distribution of wealth. The latter, however, converges to maximum inequality for heterogeneous time preferences or rates of interest (either persistent or stochastic). For the latter, the presence of finite life times leads to a distribution with finite wealth inequality featuring fat tails. (C) 2017 Elsevier B.V. All rights reserved.
机译:我们使用标准模型(其中计算了个人消费路径来解决最佳控制问题),研究了Piketty(2014)的核心主张。重要的是,r-rho> g-而不是r> g(在数据中得到确认),而是rho是时间优先级的速率。如果这一条件成立,并且生产函数中的替代弹性大于1,则从长期来看,资本份额将收敛至1。然而,这对财富分配没有重大影响。但是,后者会因时间异质性或利率(持续性或随机性)收敛到最大不等式。对于后者,存在有限的生存时间会导致分布有限,财富不平等的特征是肥尾。 (C)2017 Elsevier B.V.保留所有权利。

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