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EEP 1/ Econ C3 ENVIRONMENTAL ECONOMICS AND POLICY Problem Set 1
发布时间:2022-09-18
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EEP 1/ Econ C3
FALL SEMESTER, 2022
ENVIRONMENTAL ECONOMICS AND POLICY
Introduction to Environmental Economics and Policy
Auffhammer
Problem Set 1
1. (60 Points) Let’s imagine that the market for corn satisfies the assumptions for being a perfectly competitive market. Also let’s assume away the massive degree of government intervention that exists in this market for now. The supply curve is Qs = p − 600. Demand is given by Qd = 6000 − 2 · P .
(a) Using a graph with the price of corn on the vertical axis and the quantity of corn on the horizontal axis, draw this market. Clearly label the intercepts of demand and supply on the price axis.
(b) Calculate the equilibrium quantity and price in the market and show these in the graph above.
(c) Calculate Consumer Surplus in Dollars.
(d) Calculate Producer Surplus in Dollars.
(e) What is total welfare in the market in Dollars?
(f) Now the government decides to impose a price floor of $ 2500 in this market as it thinks corn is too cheap. Calculate equilibrium Quantity Demanded, Quantity Supplied and Excess Supply.
(g) Calculate Consumer Surplus in Dollars.
(h) Calculate Producer Surplus in Dollars.
(i) What is total welfare in the market in Dollars?
(j) Calculate Dead Weight Loss from this policy.
(k) Is society better off in terms of total welfare due to this policy? Why?
2. (20 Points) There are two markets for Boba Tea. Berkeley and Walnut Creek. Consumers in these markets are different. The demand as we draw it for these beverages (that Prof. Max despises, because they make his teeth hurt from all the sugar) in Berkeley is given by P = 30 − 5Qd . The demand as we draw it for Boba in Walnut Creek, deep in the East Bay, is given by P = 20 − 3 · Qd . The current price in each market is the same, namely $5 per unit.
(a) Graph both demand curves in the same graph and use math to figure out what the quantity sold in each market is at this price.
(b) What is the price elasticity of demand in Berkeley at the current price and quantity?
(c) What is the price elasticity of demand in Walnut Creek at the current price and quantity?
(d) If one were to levy a tax of $2 per unit of Boba, which market’s consumers would see bigger increase in price (assuming supply is identical in both places)? Why?
3. (20 Points) For each scenario below continue to envision the perfectly competitive market for corn, without any regulation applied, from the first question. For each of the scenarios below, tell me what happens to demand, supply, equilibrium quantity and equilibrium price by circling the correct answer for each.
(a) Income of consumers in the market for corn decreases.
Q* |
Increases |
Decreases |
Unchanged |
P* |
Increases |
Decreases |
Unchanged |
Demand Curve |
Shifts Up |
Shifts Down |
Unchanged |
Supply Curve |
Shifts Up |
Shifts Down |
Unchanged |
(b) There is a technological innovation that allows farmers to harvest corn at a lower cost.
Q* |
Increases |
Decreases |
Unchanged |
P* |
Increases |
Decreases |
Unchanged |
Demand Curve |
Shifts Up |
Shifts Down |
Unchanged |
Supply Curve |
Shifts Up |
Shifts Down |
Unchanged |
(c) We learn from a new UCSF study that corn is much less healthy than previously thought.
Q* |
Increases |
Decreases |
Unchanged |
P* |
Increases |
Decreases |
Unchanged |
Demand Curve |
Shifts Up |
Shifts Down |
Unchanged |
Supply Curve |
Shifts Up |
Shifts Down |
Unchanged |
(d) The price wheat, a substitute for corn, increases.
Q* |
Increases |
Decreases |
Unchanged |
P* |
Increases |
Decreases |
Unchanged |
Demand Curve |
Shifts Up |
Shifts Down |
Unchanged |
Supply Curve |
Shifts Up |
Shifts Down |
Unchanged |