Supply and Demand

4781 Words Mar 19th, 2015 20 Pages
1. award: 1.50 out of
2.50 points

The demand curve for product X is given by QXd = 500 - 5PX.

a. Find the inverse demand curve.

PX = 100 - 0.2 QXd

b. How much consumer surplus do consumers receive when Px = \$45?

\$91.00

c. How much consumer surplus do consumers receive when Px = \$25?

\$95.00

d. In general, what happens to the level of consumer surplus as the price of a good falls?

The level of consumer surplus increases as the price of a good falls.

ebook & resources
Demand
Market Equilibrium
Worksheet
Learning Objective: 02-02 Calculate consumer surplus and producer surplus, and describe what they mean.

The demand curve for product X is
A recent report indicates that nearly 50 Americans contract HIV each year through blood transfusions. Although every pint of blood donated in the United States undergoes a battery of nine different tests, existing screening methods can detect only the antibodies produced by the body’s immune system – not foreign agents in the blood. Since it takes weeks or even months for these antibodies to build up in the blood, newly infected HIV donors can pass along the virus through blood that has passed existing screening tests. Happily, researchers have developed a series of new tests aimed at detecting and removing infections from donated blood before it is used in transfusions. The obvious benefit of these tests is the reduced incidence of infection through blood transfusions. The report indicates that the current price of decontaminated blood is \$60 per pint. However, if the new screening methods are adopted, the demand and supply for decontaminated blood will change to

Qd = 210 – 1.5P and Qs = 2.5P – 150.

What price do you expect to prevail if the new screening methods are adopted? How many units of blood will be used in the United States? What is the level of consumer and producer surplus? Illustrate your findings in a graph.