Hi Everyone,

I am not sure if I need to create a unique ID for time series data. I have annual data, no gaps and 5 variables. I have tsset my data

Do I need to create the unique id? my friend has suggested I do this but with no further information. However prior to this, I had run all my regressions without it and selected the ardl based on unit root test.

If I need to create a unique id for all my variables, how do I go about it

Thanks