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near singular
Posted: Wed Oct 18, 2017 1:54 pm
by startz
The command
Code: Select all
ls grade_num @expand(course_dept_code)
works for an unstructured file. When I turn the file into a panel with a different variable for the id, I get nonsingular matrix.
Uh, what's going on?
Re: near singular
Posted: Wed Oct 18, 2017 3:56 pm
by EViews Gareth
Can you provide the file?
Re: near singular
Posted: Wed Oct 18, 2017 5:41 pm
by startz
I can't, as it's confidential. Is there something you want me to do to shed light on the issue?
Re: near singular
Posted: Wed Oct 18, 2017 5:53 pm
by EViews Gareth
Without seeing it is hard to be certain, but at a guess it is knifeedge singular. Panel LS goes through a slightly different calculation routine, and I’d guess they differ in triggering singular
Re: near singular
Posted: Wed Oct 18, 2017 5:59 pm
by startz
Without seeing it is hard to be certain, but at a guess it is knifeedge singular. Panel LS goes through a slightly different calculation routine, and I’d guess they differ in triggering singular
I would understand that if it weren't @expand. What can be multicollinear with a set of dummy variables?