Go to the Web site of the Federal Reserve Bank of St. Louis (FRED) (research.stlouisfed.org/fred2) and download annual unemployment data (UNRATE) for 1962 to the present. (To convert the data from a monthly frequency to an annual frequency, click on "Graph" and "Frequency.") Next, download the annual inflation rate measured using the consumer price index, or CPI (CPIAUCSL). (Once you have converted the data from a monthly frequency to an annual frequency, you can find the inflation rate by clicking on "Units" and selecting "Percent Change from Year Ago.") Plot both series on the same graph. Briefly explain whether for each of the following periods, the relationship between the annual unemployment rate and the annual inflation rate is consistent with a movement along the short-run Phillips curve or with a shift in the Phillips curve.
a. 1966-1969
b. 1973-1975
c. 1992-1994
d. 2000-2002