A Comprehensive Guide to Mastering Panel Unit Root in Stata with the Levin-Lin-Chu Unit-Root Test

[@zuhayrmustun4589]

Hello, you have not selected any lag order? Is there a reason for that? Is it ok not to choose any lag?

[@alljkkjj]

very helpful dr. i Have a question that is I have to conduct descriptive statistics and correlation matrix based on the first differenced data?I mean when i convert a variable into first difference then the data is changing and on the changed data ,i have to conduct descriptive and correlation matrix?or on the main variable data (raw data)? thank you

[@wilfred.theanalyst]

In this case I guess you are dealing ether with timeseries data or panel data.Now since you are ensuring that the data that you are using is stationary(stationarity test) then for the correlation & descriptive analysis you will use the new first differencing variables not the raw data variables.

[@alljkkjj]

@@wilfred.theanalyst Dr. thank you for your response. I mean my data is stationary at level . So i think i don't need to convert in first difference. And i can conduct everything on raw data. isnt it dr.?

[@wilfred.theanalyst]

@@alljkkjj thanks for the clarification.Sure if your data is stationary at level form(l0) which is your raw data.Then this ,means no need of first differencing so you can carry out the correlation and descriptive statistics on your raw data,.