Answer:
Consider the following explanation
Step-by-step explanation:
The valuation method used in this case is Contingent Valuation. In this method, the consumers or people are asked to state a value they would assign to a certain good. They are asked to state their willingness to pay. In this case the willingness to pay is asked in the form of increased taxes they would be willing to pay to preserve the National Park service.
The values that are measured in this survey are largely non-use value. Non use value is the value people assign to something not for the utility they receive directly from it but from the mere existence value of the resource or National Park in this case. Hence in this case the existence value of the national parks is measured