Hi guys,

Is it important to check for stationarity if I have 11 time periods? Also, when i Run stationarity check for GDP, it says that p value is very low, therefore it is stationary, but logically it should not be the case. What I'm doing wrong? Also I have attached the line code that im running on R

purtest(GDP~trend,data=RStudio,index=c('Country','Year'),pmax=2,test='levinlin')