[Gretl-users] Panel data

Hello, I want to ask several question about panel data in gretl. I currently working on my thesis that use panel data. I have already tested my data to choose the right models (pooled/fixed/random). My model is fixed effect models. Then I want to test its normality and heteroscedasticity. I have tried to click on test > heteroscedasticity > groupwise. My model is suffered the heteroskedasticity problem. So I tried to rectify my model from heteroskedasticity by ticking the robust standard error arellano. But by model still suffer of heteroskedasticity problem. So what should I do? And about normality my model is not distributed normaly but I don't know how to rectify it in gretl Hope you may give a solution to my problem. Thank you in advance Sincerely, Silviana Gunarsih Santoso --