Search found 9 matches

by samewing7
Tue Apr 05, 2016 2:43 am
Forum: Estimation
Topic: VAR stability
Replies: 8
Views: 8215

Re: VAR stability

It works on EViews 9.5 Student Version Lite... Hi Gareth, Sorry to be a pain again. I have entered the command as you instructed, however, I am now met with the error message "Index missing in OI1.@companion"". What does this mean? Is it possible to rectify. Thank you for your on goi...
by samewing7
Fri Apr 01, 2016 9:40 am
Forum: Estimation
Topic: VAR stability
Replies: 8
Views: 8215

Re: VAR stability

It is only available in EViews 9.5 and above.
by samewing7
Fri Apr 01, 2016 9:39 am
Forum: Estimation
Topic: VAR stability
Replies: 8
Views: 8215

Re: VAR stability

I have the student lite version, does it not work on that?
by samewing7
Fri Apr 01, 2016 9:18 am
Forum: Estimation
Topic: VAR stability
Replies: 8
Views: 8215

Re: VAR stability

varname.@companion returns the companion matrix of the VAR. You can then find the eigenvalues with the @eigenvalues function. thank you for this. i have input the command, however, when I enter the command I am met with the message "@COMPANION is not a member or procedure of NOPI1" what w...
by samewing7
Fri Apr 01, 2016 2:57 am
Forum: Estimation
Topic: VAR stability
Replies: 8
Views: 8215

VAR stability

Hello,

I am currently constructing a unrestriced VAR with 4 variables. As I want to use impulse response functions I want to test for stability in the system. Is it possible to find the eigenvalues of the "companion matrix" of the system using eviews?

Regards,

Sam
by samewing7
Wed Mar 30, 2016 5:10 am
Forum: Estimation
Topic: t test statistics
Replies: 2
Views: 6171

t test statistics

Hello, I have an extremely basic question but its one i just want to confirm. When I create a VAR I move to the estimation output page, which gives me the SE and t-statistics of the coefficients. What is the t-statistic testing? if it is significant, does that imply granger causality or that it is j...
by samewing7
Tue Mar 22, 2016 5:38 am
Forum: Econometric Discussions
Topic: Hetroskelasticity in VAR model
Replies: 1
Views: 3825

Hetroskelasticity in VAR model

Hello, I am trying to create a 5 variable VAR model. However, although there is no autocorrelation, when I perform white tests on my model hetroskelaticity is present. My data is all I(0) and I do not want to increase the lags as this will cause the problem of overfitting as I only have 75 observati...
by samewing7
Mon Mar 21, 2016 6:45 am
Forum: Econometric Discussions
Topic: How many observations do I need?
Replies: 3
Views: 5231

Re: How many observations do I need?

Hi Sam,

You need to convert the quarterly data into the monthly.

Hi dakila,

Thank your for your reply.

I can not convert my data into monthly data as this is not available for all variables.

Can you think of another solution?

Thanks
by samewing7
Mon Mar 21, 2016 4:31 am
Forum: Econometric Discussions
Topic: How many observations do I need?
Replies: 3
Views: 5231

How many observations do I need?

Hello, I am completing a paper on the effects of the oil price on the brazilian economy. I am using a level VAR model and want to include the following variables: GDP, INflation, interest rates, terms of trade, family consumption and the oil price. However, due to the lack of data in Brazil I only h...

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