EViews.com

Does stationarity of variables matters to simultaneous equations?
In another words, I work on a simultaneous equations system, should I test the variables for unit root?

How are the identifiers in a pooled system grouped?
suppose water consumption of 48 states which are included in 9 region. Is there any command by which the water consumption of the related states, situated in a region, are summed, or they should be summed one by one?
Is "@group" useful?

the question remained unanswered and it is mine too, how to run structure break in eviews?

firstly thanks for ur responses
what i asked depends on the relationship between variance and one of the independent variables,
how can i find the relationship
for example if var= Z . X
var= variance
Z= what i need
X= one of the coefficients


then how can i gain variance to calculate Z ?

i had done what you have told but i do not know how to fill the fields of "TYPE" and "WEIGHT SERIES" in the window of "equation estimation>option". "TYPE" includes variance, S.D deviation and their inverses. which one should be used? what should be written in ...

hi i used OLS for a time series model then i found out the problem is heteroscedasticity so i try to estimate the model with GLS or WLS but i do not know how to do it in EViews. also which one of the independent variables should be multiplied by the either sides of the equation to make an equation w...