Reforming the U.S. coal leasing program. James Stock, December 2, 2016, Paper, "The article stresses the need for reform of the U.S. coal leasing program. Topics discussed include the social costs of coal extraction, the extent of substitution away from federal coal induced by raising additional leasing revenue and the lack of competition on the leasing auctions. Also mentioned are the incentives inherent in the leasing program structure of the U.S." Link