159 
TOTAL LONG-TERM USAGE ‘vs. USER FLEE 
User Fee 
a tet te a EN ee LTT TS BT EY 
Q 
m 
Usage 
FIGURE 1 
(4) Maximize the profit of the park over time. This would involve 
setting usage at the point where the marginal net present value of 
benefits of additional use equals the marginal net present value of 
costs of additional use. In order to do this realistically an extensive 
cost-benefit analysis would have to be made analyzing future usage 
affects on expected costs and what pricing levels would lead to what 
usage in the future. 
It is, of course, possible to extend such a list of alternative objectives 
almost indefinitely. However, the point to be made is that user fees 
should play an important role and exactly what form they do take 
will be influenced by the objectives society sets. Moreover, any realistic 
system of user fees would most likely want to take into account many 
factors not possible to show in figure 1, such as the attempt to even 
out peaks in demand and equating individual usage with incremental 
costs incurred, if this was consistent with the desired objective 
function. 
