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...

Previous work on crude oil price modeling has generally focused on two theoretical approaches, either the optimal control analysis of pricing of a depletable resource, or OPEC as a partial monopolist setting oil prices to maximize net present value. Neither has been wholly satisfactory. We...