ABSTRACT
The relationship estimated by Marion Clawson could be looked at as a sort of gravity model, inasmuch as the traffic from any particular area to the park is inversely related to the distance and directly to the population of the area. Since the journey costs are the same for the marginal n-day visitors, the total benefit enjoyed by this n-day visitor can also be taken to be just equal to the total travelling costs. If these assumptions are implausible, it would be necessary to separate the demand curves for one-day, two-day, and up to n-day visitors. What is perhaps of particular relevance to the demand for recreation, and is brought out in some of the charts drawn by Clawson and Knetsch, is the relation between the reduction in the working week, and the improvement in roads and travel conditions generally, on the one hand, and the demand for recreation facilities, on the other.
