Dear all
I need a clarification. If I used log data to two variables ‘x’ and 'y'. And I found both variables are stationary at the first difference. So for analysing Johansen's test, Engle- Granger test, VECM test, which data should I use? Is it first difference data or log data?
thanks
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- Sat Mar 30, 2013 3:07 pm
- Forum: Econometric Discussions
- Topic: First difference
- Replies: 6
- Views: 17389