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Post Closed as "Duplicate" by Richard Hardy, kjetil b halvorsen
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I have 5 series, I did ADF on my series and found that 3 series have unit roots(x1, x2, and x3) and 2 don't(x4 and x5). Still using the level variables I did Engle e Granger test and Johansen test( Trace test indicates 2 cointegrating) and found that there is cointegration between the series. how should I proceed with this? Can I mix differentiate with non differentiate variables? Should I do a VAR for the first differences in the series or a VECM?

  • I have 5 series, I did ADF on my series and found that 3 series have unit roots(x1, x2, and x3) and 2 don't(x4 and x5). Still using the level variables I did Engle e Granger test and Johansen test( Trace test indicates 2 cointegrating) and found that there is cointegration between the series.

  • how should I proceed with this? Can I mix differentiate with non differentiate variables? Should I do a VAR for the first differences in the series or a VECM?

I have 5 series, I did ADF on my series and found that 3 series have unit roots(x1, x2, and x3) and 2 don't(x4 and x5). Still using the level variables I did Engle e Granger test and Johansen test( Trace test indicates 2 cointegrating) and found that there is cointegration between the series. how should I proceed with this? Can I mix differentiate with non differentiate variables? Should I do a VAR for the first differences in the series or a VECM?

  • I have 5 series, I did ADF on my series and found that 3 series have unit roots(x1, x2, and x3) and 2 don't(x4 and x5). Still using the level variables I did Engle e Granger test and Johansen test( Trace test indicates 2 cointegrating) and found that there is cointegration between the series.

  • how should I proceed with this? Can I mix differentiate with non differentiate variables? Should I do a VAR for the first differences in the series or a VECM?

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Modelling VAR or VECM

I have 5 series, I did ADF on my series and found that 3 series have unit roots(x1, x2, and x3) and 2 don't(x4 and x5). Still using the level variables I did Engle e Granger test and Johansen test( Trace test indicates 2 cointegrating) and found that there is cointegration between the series. how should I proceed with this? Can I mix differentiate with non differentiate variables? Should I do a VAR for the first differences in the series or a VECM?