Metal prices as a function of ore grade
نویسندگان
چکیده
Barnett and Morse’ examined the economics of natural resource availability using data on capital, labour and output for the USA between 1870 and 1957. They tested the hypothesis that the scarcity of natural resources was increasing by examining the trend of unit cost of extractive products in the agricultural, mineral, forestry and fishing industries. Working in terms of index numbers they defined a measure of unit costs
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