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Answer the following related questions The graph below shows the plot of the log prices for SPOT denoted by LSPOT and FUTURES denoted by LFUTURES.

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Answer the following related questions

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The graph below shows the plot of the log prices for SPOT denoted by LSPOT and FUTURES denoted by LFUTURES. 7.4 7.3 7.2 7.1 7.0 LSPOT 6.9 6.8 6.7 - LFUTURES 11 III IV In I IV In I IV II III IV II III IV 2002 2003 2004 2005 2006 2007 (a) Is the statement "LFUTURES leads LSPOT" true or false? Explain. [1] (b) A student runs the following regression to determine the relationship between LFUTURES and LSPOT: LFUTURES = a + BLSPOT + u Is this the correct regression to run? Explain based on your answer in (a). [2] The results of the Augmented Dickey Fuller test for both series are shown below. Unit Root Test for LSPOT Exogenous: Constant, Linear Trend Lag Length: 1 (Automatic - based on SIC, maxlag=10) t-Statistic Prob.* Augmented Dickey-Fuller test statistic -4.515486 0.0031 Test critical values: 1% level -4.107947 5% level -3.481595 10% level -3.168695 *Mackinnon (1996) one-sided p-values. Unit Root Test for LFUTURES Exogenous: Constant, Linear Trend Lag Length: 0 (Automatic - based on SIC, maxlag=10) t-Statistic Prob.* Augmented Dickey-Fuller test statistic -3.284052 0.0780 Test critical values: 1% level -4.105534 5% level -3.480463 10% level -3.168039 *Mackinnon (1996) one-sided p-values. (c) Explain the difference between the Augmented Dickey Fuller (ADF) test and the Dickey Fuller (DF) test. Why does one perform an ADF test in the presence of autocorrelation? [2] (d) Stat the null and alternative hypotheses for the ADF test. Using the unit root test results, what do you conclude about the stationarity property of LSPOT and LFUTURES at the 5% significance level. [2, 2] (e) Provide two different and alternative terminologies for a series that has a unit root. [2] (f) State and explain two problems associated with using LSPOT and LFUTURES in regression analysis? [2] The table below shows the results of the Engle and Granger test. The test is performed with LSPOT as the dependent variable followed by LFUTURES as the dependent variable. Series: LSPOT LFUTURES Sample: 2002M02 2007M07 Included observations: 66 Cointegrating equation deterministics: C @TREND Automatic lags specification based on Schwarz criterion (maxlag=10) Dependent tau-statistic Prob.* z-statistic Prob.* LSPOT -8.101528 0.0000 -66.98674 0.0000 LFUTURES -7.928076 0.0000 -65.65357 0.0000 *Mackinnon (1996) p-values. (g) What can you conclude about the nature of long run relationship (or cointegration) between LSPOT and LFUTURES based on the Engle and Granger test results? Explain. [2]

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