wald test sum of coefficients
Posted: Wed Jul 16, 2014 1:36 pm
Hello. I am running a regression (OLS) with the following representation: TIR = C(1) + C(2)*LIQ090 + C(3)*LOG(DUR) + C(4)*DR1 + C(5)*MON + C(6)*LIQ090*MON + C(7)*DR1*MON + C(8)*DR1*LIQ090
I want to test that the sum of C(2), C(6) and C(8) is negative. I tried with a joint Wald test using C(2) + C(6) +C(8) = 0, but then the question is: if I have a rejection of the null is the sum positive or negative? (I understand the test is two-tailed so both directions are possible).
Is there a way to test if the sum of the 3 coefficients is negative? I'm using Eviews 7.
Thanks.
I want to test that the sum of C(2), C(6) and C(8) is negative. I tried with a joint Wald test using C(2) + C(6) +C(8) = 0, but then the question is: if I have a rejection of the null is the sum positive or negative? (I understand the test is two-tailed so both directions are possible).
Is there a way to test if the sum of the 3 coefficients is negative? I'm using Eviews 7.
Thanks.