Geologic estimates of remaining global petroleum resources place about 50% in the Persian Gulf. Production costs are estimated at $5 per barrel there, and $15 per barrel in the North Sea and Alaska. Using mathematical methods derived from depletion theory is utilized to explain the $15-$20 per...

Emissions of methane from bovine animals have been estimated elsewhere at approximately 60 million tons per year, 15% of global methane releases. This estimate is misleading for two reasons: it ignores the differences in atmospheric residence time between carbon dioxide and methane, and it...

The U.S. demand for natural gas, a cleaner-burning fossil fuel, is projected to rise over the next decade. The import supply of natural gas is tight, so the growing demand will likely intensify domestic production. Pressure to drill on U.S. public and private lands will continue to grow....

Economic theory gives no clear indication of the minimum number of producers necessary for a market to define competitive price-quantity equilibria which approximate price equal to marginal cost. Previous work and FERC Guidelines generally suggest that 6 to 10 generators may be workably...

We examine the effects of entrance .fees and other factors in visitation to U.S. national park areas under two partially competing hypotheses: 1) fees are significant explanatory variables; and 2) individual area attributes are the primary determinants of visitation rates. (National park areas...