### STATA and EVIEWS different results in a PMG panel model

Posted:

**Thu Jun 28, 2018 10:00 am**I'm running this PMG panel model in STATA and EVIEWS:

ef = f(v1, p1, r1, gdp, gdp2)

The data is anual about ecological footprint (ef), GDP and its square, and institutional index like voice and accountabily (v1), political stability (p1) and regulatory quality (r1). All the variables are in logaritms execpt for the intitutional indexs. I have N=16 and T=13

I choose the automatic selection of lags with the Akaike criteria and with a max lags of 1 in dependent variable and regressors (becase it doesn't allows me to choose more). And I choose trend specification in constant (levels).

I did the same in STATA, but the estimated results are different. I think the problem is with the v1 variable because when I delete the v1 varible of the estimation, the results of both programs are exactly the same.

I checked the v1 variable in both date base (for eviews and for stata), because I thought it could be the problem, but it's the same.

Therefore, I don't know why could be happening.

Does anyone knows what could be happening?

ef = f(v1, p1, r1, gdp, gdp2)

The data is anual about ecological footprint (ef), GDP and its square, and institutional index like voice and accountabily (v1), political stability (p1) and regulatory quality (r1). All the variables are in logaritms execpt for the intitutional indexs. I have N=16 and T=13

I choose the automatic selection of lags with the Akaike criteria and with a max lags of 1 in dependent variable and regressors (becase it doesn't allows me to choose more). And I choose trend specification in constant (levels).

I did the same in STATA, but the estimated results are different. I think the problem is with the v1 variable because when I delete the v1 varible of the estimation, the results of both programs are exactly the same.

I checked the v1 variable in both date base (for eviews and for stata), because I thought it could be the problem, but it's the same.

Therefore, I don't know why could be happening.

Does anyone knows what could be happening?