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Value and depreciation of mineral resources over the very long run: An empirical contrast of different methods
Rubio Varas, M. del Mar
Universitat Pompeu Fabra. Departament d'Economia i Empresa
The paper contrasts empirically the results of alternative methods for estimating thevalue and the depreciation of mineral resources. The historical data of Mexico andVenezuela, covering the period 1920s-1980s, is used to contrast the results of severalmethods. These are the present value, the net price method, the user cost method andthe imputed income method. The paper establishes that the net price and the user costare not competing methods as such, but alternative adjustments to different scenariosof closed and open economies. The results prove that the biases of the methods, ascommonly described in the theoretical literature, only hold under the most restrictedscenario of constant rents over time. It is argued that the difference between what isexpected to happen and what actually did happen is for the most part due to a missingvariable, namely technological change. This is an important caveat to therecommendations made based on these models.
Economic and Business History
Macroeconomics and International Economics
mineral assets
net price
user costs
imputed income
environmental accounts
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