Cointegration no constant

Hi,

I am trying to estimate a VECM without constant using the 
following code:

data(finland)
sjf <- finland
sjf.reg<-ca.jo(sjf, type = c("eigen"), ecdet = c("none"), K = 
2,spec=c("transitory"), season = NULL, dumvar = NULL)
cajools(sjf.reg)


While the cointegration test does not use a constant, it is 
used in the cajools which I do not want. I am sure I am doing 
something wrong - what should I change?

Hello Ralph,

are you really sure that you do want to include a constant in cajools?
If so, this can be swiftly accomplished by:

sjf.reg at Z1 <- sjf.reg at Z1[, -1]
cajools(sjf.reg)

i.e., you drop the constant from the slot Z1 (have a look at cajools to
see how the regression are set up). You might want consider using
cajorls, too.


Best,
Bernhard

Any help very much appreciated!

Ralph

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