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thanks for your help gareth

yes i am using eviews 7 and i am estimating the equation with the gmm model but i also have the eviews 6, and in this version of eviews i recived the message "this test is not allowed with this estimation model"

in my screen doesnt appear the j stat difference button

can you tell me how to perform it?

but its posible to perform the omitted variables test with the gmm model?

hello
im using eviews 7
I want to perform the omitted variables test with the gmm model, but i recibe a message that asked me to re-estimate my model, because this model was estimate with a previous version of eviews but thats not true i estimate my model with eviews 7. what can i do?

hello
i want to know how can i interpret the p value of the sargan test
im using the gmm model
i obtained a p value of 0.00
calculated witth the following command : scalar pva =@chisq(285.11,60)
if anyone can help me
thanks

but how can i choose the correct number of instruments

hello
how can i fix the problem of receiving the message "number of instruments greater than number of observations"
thanks