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ECON3128/ECON6040 Tutorial 4 Semester 2 - 2022
发布时间:2022-08-30
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ECON3128/ECON6040
Tutorial 4
Semester 2 - 2022
Problem Solving
Q1: Consider the preservation of a scenic river. There are 100 people who enjoys the scenary of the river. let Q be the number of kilometers of the river to preserve. The marginal benefits of the perservation for each individual is given as
MDp = 10 − Q
The marginal costs for the preservation is constant at $500 per kilometers. a What is the efficient number of kilometers of river to preserve? b How large is the total economic surplus of the optimal preservation?
Q2: Suppose a market demand for a resource is P = 200 − 4Q and the market supply is P = 50 + 2Q. In addition, the marginal net benefit function is expected to be the same for the next generation. The discount rate is 50%. The total resource supply over two periods are 10.
a What will be the amount of consumption in each generation. Draw a graph to illustrate your answer.
b How much is the marginal user cost at dynamic equilibrium level of consumption? What is the approperiate amount of resource depletion tax in perid one?
c Draw a supply-demand graph for the frist period. Show the depletion tax as well as the user costs on the graph.
