Hi,
Can anyone refer me to the right methodology of selecting the appropriate
transformation to a time series (such as the logarithmic transmormation)?
When should I apply logs to the data in a time series context?
In some cases I saw that a simple delta Xt is used to achieve stationarity
in the series but sometimes also logXt-logXt-1?
Thanks for any comments.
Regards,
Leo.
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