st: test for time trend

["Cornelia Schmidt" <laorcas@hotmail.de>]

Hello,

I know it is a basic question, but it would be great if you could help me.
I have a panel dataset for a sample of 50 countries over a period of 40 
years.

How can I test if there is a time trend in the data and how can I correct 
for it?

Thank you for your help.

Best regards


Hanna

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