Hello, I want to panel data analysis with 8 entities for 30 years. However, I figured that my dependent variables each have different trend (constant, increasing, decreasing). I would like to first do unit root test on checking the stationarity of my error term. I am not sure how do I proceed with it since I have different trend with my dependent variables. Besides, I am not sure which unit root test should I use. I am new with this. Please advice. Thank you.
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