Dear Group: I want to get the loglik of the regresion associated to the estimation of the unit root test Zivot-Andrews of the package urca. I am new using R, then I simply tried the next sequence: > A<-ur.za(var,model="intercept",lag=2) > logLik(A) but the result is an error, and I think it is because A (the result of the function) is not class S4. > class(A) [1] "ur.za" attr(,"package") [1] "urca" I want to use the logLik to compare different number of lags, in order to know the optimal one. I will be really grateful if someone can tell me how to calculate the logLik or the optimal number of lags. Thank you very much!, Karla ¿Cuál de estas 16 personalidades es la tuya? ¡Descubre quién eres realmente! _________________________________________________________________ [[elided Hotmail spam]] [[alternative HTML version deleted]]
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