Dear friends

I am looking at a panel data set (from 1960 to 2015) where the dependent variable is military burden of Asian countries and independent variables consist of several determinants such as income, number of borders etc. I want to look at how change of military burden in China or India has impacted on military burden of other Asian countries. With my data set I have the problem of autocorrelation (according to the xtserial). While reading on this, I found that I can use xtregar command or xtreg vce(robust). Can anyone suggest me what would be the best method to use to correct autocorrelation in my case and I want to control for country fixed effects also.

Thanks in advance

Harsha