Technological progress, obsolescence, and depreciation
Technological progress, obsolescence, and depreciation
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技术进步、过时和折旧
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Blanca Martínez
中科院分区：
文献类型：
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作者：
R. Boucekkine;F. Río;Blanca Martínez
我们构建了一个两个部门的葡萄酒资本模型，其中包括中性的和投资特定的技术进步，以及每个葡萄酒的可变利用。资本品的寿命是内生的，它依赖于相关的维护成本。首先，我们证明了资本的寿命是递增的。递减)中性率函数(分别为具体投资)技术进步。其次，我们发现，随着投资专用性技术进步的加快，与使用相关的折旧率和报废率都会增加。然而，当中性技术进步加速时，后者会下降，而前者不受影响。研究还表明：(I)经济折旧率取决于未经质量调整的投资相对价格的下降率；(Ii)与年龄相关的折旧率取决于陈旧率。
We construct a two-sector vintage capital model with neutral and investment-specific technical progress and variable utilization of each vintage. The lifetime of capital goods is endogenous and it relies on the associated maintenance costs. First, we show that the lifetime of capital is an increasing (resp. decreasing) function of the rate of neutral (resp. investment-specific) technical progress. Second, we show that both the use-related depreciation rate and the scrapping rate increase when investment-specific technical progress accelerates. However, the latter drops when neutral technical progress accelerates, while the former remains unaffected. It is also shown that (i) the economic depreciation rate depends on the decline rate of the quality-unadjusted relative price of investment and (ii) the age-related depreciation rate depends on the obsolescence rate.