For this exercise, you will need to download quarterly Personal Consumption Expenditures: Chain-type Price Index (PCECTPI) from FRED. The variable PCECTPI is the price index for personal consumption expenditures from the U.S. National Income and Product Accounts. In this exercise, you will construct forecasting models for the rate of inflation based on PCECTPI. For the analysis, you will use the sample period 1963:Q1-2019:Q4, but data before 1963 may be used, as necessary, as initial values for lags in regressions. a. Compute the inflation rate, Infl, = 400 x [In(PCECTPI) - In(PCECTPI-1)]. What are the units of Infl? (Is Infl measured in dollars, percentage points, percentage per quarter, percentage per year, or something else? Explain.) b. Compute the first four autocorrelations of AInfl. Estimate an AR(2) model for AInfl. Present you results. c. Forecast AInfl2020:Q1, the change in inflation from 2020:Q1 to 2019:Q4. d. Forecast Infl2020:02, the change in inflation from 2020:Q2 to 2020:Q1 (Use an iterated forecast). e. Forecast Infl2020:22. the rate of inflation in 2020:Q2.

ENGR.ECONOMIC ANALYSIS
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ISBN:9780190931919
Author:NEWNAN
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Chapter1: Making Economics Decisions
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For this exercise, you will need to download quarterly Personal Consumption Expenditures: Chain-type Price Index (PCECTPI) from FRED. The variable PCECTPI is the price index for personal
consumption expenditures from the U.S. National Income and Product Accounts. In this exercise, you will construct forecasting models for the rate of inflation based on PCECTPI. For the analysis, you
will use the sample period 1963:Q1-2019:Q4, but data before 1963 may be used, as necessary, as initial values for lags in regressions.
a. Compute the inflation rate, Infl, = 400 x [In(PCECTPI) - In(PCECTPI-1)]. What are the units of Infl? (Is Infl measured in dollars, percentage points, percentage per quarter, percentage
per year, or something else? Explain.)
b. Compute the first four autocorrelations of AInfl. Estimate an AR(2) model for AInfl. Present you results.
c. Forecast AInfl2020:Q1, the change in inflation from 2020:Q1 to 2019:Q4.
d. Forecast Infl2020:02, the change in inflation from 2020:Q2 to 2020:Q1 (Use an iterated forecast).
e. Forecast Infl2020:22. the rate of inflation in 2020:Q2.
Transcribed Image Text:For this exercise, you will need to download quarterly Personal Consumption Expenditures: Chain-type Price Index (PCECTPI) from FRED. The variable PCECTPI is the price index for personal consumption expenditures from the U.S. National Income and Product Accounts. In this exercise, you will construct forecasting models for the rate of inflation based on PCECTPI. For the analysis, you will use the sample period 1963:Q1-2019:Q4, but data before 1963 may be used, as necessary, as initial values for lags in regressions. a. Compute the inflation rate, Infl, = 400 x [In(PCECTPI) - In(PCECTPI-1)]. What are the units of Infl? (Is Infl measured in dollars, percentage points, percentage per quarter, percentage per year, or something else? Explain.) b. Compute the first four autocorrelations of AInfl. Estimate an AR(2) model for AInfl. Present you results. c. Forecast AInfl2020:Q1, the change in inflation from 2020:Q1 to 2019:Q4. d. Forecast Infl2020:02, the change in inflation from 2020:Q2 to 2020:Q1 (Use an iterated forecast). e. Forecast Infl2020:22. the rate of inflation in 2020:Q2.
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