a. Because gasoline is a necessity, consumers do not decrease their quantity demanded
in either the short run or the long run.
b. Consumers react to a 10% increase in price with about a 10% decrease in quantity
demanded in both the short run and long run.
c. Consumers decrease their quantity demanded more in the short run than in the long
run.
d. Consumers decrease their quantity demanded more in the long run than in the short
run.
The market for diamond rings is closely linked to the market for highquality diamonds.
If a large quantity of highquality diamonds enters the market, then the
a. supply curve for diamond rings will shift right, which will create a shortage at the
current price. Price will increase, which will decrease quantity demanded and increase
quantity supplied. The new market equilibrium will be at a higher price and higher
quantity.
b. supply curve for diamond rings will shift right, which will create a surplus at the
current price. Price will decrease, which will increase quantity demanded and decrease
quantity supplied. The new market equilibrium will be at a lower price and higher
quantity.
c. demand curve for diamond rings will shift right, which will create a shortage at the
current price. Price will increase, which will decrease quantity demanded and increase
quantity supplied. The new market equilibrium will be at a higher price and higher
quantity.
d. demand curve for diamond rings will shift right, which will create a surplus at the
current price. Price will decrease, which will increase quantity demanded and decrease
quantity supplied. The new market equilibrium will be at a lower price and higher
quantity.
Figure 716