Stationary Problem

[mhassani]

Hi Guys,

I'm currently trying to make a regression on eviews, i was told by my supervisor to make my variables stationary so for example Gdp was dgp=gdp-gdp(-1) but the problem is that when i try to do the same with my FDI which i imported from excel it would change to characters and not let me do it.

Does anyone know what i can do solve this problem?

Also i don't really understand what stationary and non-stationary means, any chance someone could explain it to me please.

Thank you,

Mo :)

i will attach my excel file and eviews file tomorrow once i can get access to my work