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  3. exercise 5 parts ad iv...

Question: exercise 5 parts ad iv...

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d. LY, for some integer k> 0 5. The following table contains quarterly nominal GDP in U.S. (billions of dol- lars). Let Y, denote the GDP at time t and let y, = ln (Y). (Show your calculations in a spreadsheet, e.g., in Microsoft Excel.) a. Plot the time series (Y). Can the underlying stochastic process be weakly b. Calculate the growth rate of nominal GDP by computing the percentage c. Plot the natural logarithm of the series (y,) and compare with part i., com- d. Repeat part i. by taking the first log-differences (in percentage), that is, e. Do you observe any significant differences between gır and gar computed in stationary of any order? Explain why or why not. changes of the series, that is, g,-100 × (Yt-Y,-)/ menting on stationarity and smoothness g21 100 X (V1--1). ii. and iv, respectively? Date GDP 2001-01-01 10021.5 10128.9 10135.1 10226.3 10338.2 10445.7 10546.5 10617.5 10744.6 10884.0 11116.7 11270.9 2004-01-0111472.6 11657.5 2001-04-01 2001-07-01 2001-10-01 2002-01-01 2002-04-01 2002-07-01 2002-10-01 2003-01-01 2003-04-01 2003-07-01 2003-10-01 2004-04-01 2004-07-01 11814.9 2004-10-0111994.8

Exercise 5 parts a-d (i-v)

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