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# Price Shift Results in Demand

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1. Which of the following event will shift the demand for apple to the right?

a. An increase in income
b. An increase in the price of bananas, a substitute for apple
c. A news release affirming that "an apple a day indeed keeps doctors away"
d. A sudden increase in birth rate
e. All of the above

2. If the government imposes a price above the equilibrium price, then this price is
called__________, which will lead to a(n) ___________.

a. a price ceiling, excess demand
b. a price ceiling, excess supply
c. a price floor, excess demand
d. a price floor, excess supply
e. an equilibrium price, equilibrium output

3. If the demand curve is Q P D = 100 −10 and there is \$1 price increase, then the
elasticity of demand at P=2 is ___________. (Hint: you need to calculate the quantity
demanded at P=2 and P=3, and then apply the elasticity formula.)

a. -0.25
b. -0.5
c. -0.75
d. -1
e. Insufficient information to derive the elasticity

4. If the absolute value of a demand elasticity is less than 1, then

a. the demand is inelastic, and hence a price rise will reduce the total revenue.
b. the demand is inelastic, and hence a price rise will increase the total revenue.
c. the demand is elastic, and hence a price rise will reduce the total revenue.
d. the demand is elastic, and hence a price rise will increase the total revenue.
e. there is no information on the change of total revenue after a price rise.

5. If the cross-price elasticity is negative, then the two goods are ___________.

a. unrelated
b. substitutes
c. complements
d. normal goods