[R] about systemfit
Martin Ivanov
tramni at abv.bg
Thu Apr 5 19:01:54 CEST 2007
Thank you very much for your responsiveness. Here are the tests that show the same results, as they must:
linear.hypothesis(model=adfResulm,hypothesis.matrix=Rrestr10,test="Chisq"):
Res.Df RSS Df Sum of Sq Chisq Pr(>Chisq)
1 127 7.3782
2 137 7.6848 -10 -0.3066 5.2769 0.872
waldtest.systemfit(object=adfResu,R.restr=Rrestr10):
Wald-test for linear parameter restrictions in equation systems
Wald-statistic: 5.277
degrees of freedom: 10
p-value: 0.8719
So the Chisq test with linear.hypothesis from car and the waldtest.systemfit give the same output. But the F test with linear.hypothesis from car and ftest.systemfit give absolutely different results, as I demonstrated in my first post. I have no idea why.
Regards,
Martin
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