do you mean Standard Industrial Classification (SIC) Values?

please give us more explanation about this point.

If you mean Schwartz Information Criterion, the answer is yes, SIC can be positive.

Schwarz Information Criterion (SIC)

See these links:

https://www.stat.ipb.ac.id/en/uploads/KS/S2%20-%20ADW/3%20Montgomery%20-%20Introduction%20to%20Time%20Series%20Analysis%20and%20Forecasting.pdf

..... page 59.

https://en.wikipedia.org/wiki/Bayesian_information_criterion

Thank you so much for your kind help, Prof Remal Al-Gounmeein and Prof Ette Etuk

Marwa Ghareeb Ghanem Ma'am, by SIC I meant Schwartz Information Criterion.

It may depend on the formula used to calculate it. You can either use the full log-likelihood (including the 2pi factor and the estimate of the variance), the concentrated likelihood, minus the sum of squares or the sum of squares.