Refer to Figure 15-5. Assuming that the economy starts at point X, a decrease in world
oil prices would
a. move the economy to point A
b. move the economy to point B
c. shift the aggregate supply curve upward to curve E
d. shift the aggregate supply curve downward to curve F
e. have no impact since the model only shows the relationship between the overall price
level and real GDP
Suppose that over time, consumers used discount stores at an increasing rate, the CPI
would tend to be
a. accurate
b. underestimated because consumers would buy goods and services at lower prices
than those collected by the BLS
c. underestimated because consumers would buy goods and services at higher prices
than those collected by the BLS
d. overestimated because consumers would buy goods and services at lower prices than
those collected by the BLS
e. overestimated because consumers would buy goods and services at higher prices than
those collected by the BLS