Query in gretl software

[Nidhi Thakur]

Hello everyone,  I have a issue of 'positive matrix is not defined' in case of Arellano and Bond model' . My durbin Watson value signifies autocorrelation as well my existing literature supports for dynamic panel.  I am using gretl but unable to get the results in case of gmm due to problem of positive matrix is not defined  as note. Kindly help me to resolve this issue and make me know what is reason behind it

[Miklesh Yadav]

Dear Nidhi,

It happens because of any of the following reasons;
1) if your data has missing values .
2) if there is linear dependency.
3) Because of duplicacy   of the cross sectional unit or time period.

Regards

On Fri, May 20, 2022 at 1:38 PM Nidhi Thakur <nidhitha...@gmail.com> wrote:

Hello everyone,  I have a issue of 'positive matrix is not defined' in case of Arellano and Bond model' . My durbin Watson value signifies autocorrelation as well my existing literature supports for dynamic panel.  I am using gretl but unable to get the results in case of gmm due to problem of positive matrix is not defined  as note. Kindly help me to resolve this issue and make me know what is reason behind it

--
Protocols of this Group:
 
1. Plz search previous post in group before posing the question.
2. Don't write query in someone's post. Always use the option of New topic for the new question. You can do this by writing to dataanalys...@googlegroups.com
3. Its better to give a proper subject to your post/query. It'll help others while searching.
4. Never write Open ended queries. This group intend to help research scholars NOT FOR WORK THEM.
5. Never write words like URGENT in ur posts. People will help them when they are free.
6. Never upload any info about National Seminars/Conferences. Send such info on personal emails. And feel free to share any RESEARCH related info.
7. No Happy New Year, Happy Diwali, Happy Holi, Happy B'day, Happy Anniversary etc. allowed on this group.
8. Few months back there was a facility for asking & sharing the Research Papers. Now there is no provision of asking for the research paper here.
 
Let’s make a better research environment.
---
You received this message because you are subscribed to the Google Groups "DataAnalysis" group.
To unsubscribe from this group and stop receiving emails from it, send an email to dataanalysistrai...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/dataanalysistraining/CAJ82zEg7tCMv_62j1GJ7RkyvFoTs%2BXnB9AXy5xPfYHGf9MiU4Q%40mail.gmail.com.