Question: Use the data in HSEINV for this exercise. (i) Test for a unit root in log1invpc2, including a linear time trend and two lags of

Use the data in HSEINV for this exercise.

(i) Test for a unit root in log1invpc2, including a linear time trend and two lags of Dlog1invpct 2.

Use a 5% significance level.

(ii) Use the approach from part (i) to test for a unit root in log1price2.

(iii) Given the outcomes in parts (i) and (ii), does it make sense to test for cointegration between log1invpc2 and log1price2?

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