JEL classification

Journal of Economic Literature Classification (10725)

L - Industrial Organization (960)

L7 - Industry Studies: Primary Products and Construction (21)

L70 - General (4)

L71 - Mining, Extraction, and Refining: Hydrocarbon Fuels (6)

L72 - Mining, Extraction, and Refining: Other Nonrenewable Resources (3)

L73 - Forest Products: Lumber and Paper (4)

L74 - Construction (3)

L79 - Other (1)