OLS with quadratics

[Josh]

I'm trying to run the regression:

nettfa=c(1)+c(2)*x+c(3)y+c(4)y^2+c(5)*z+c(6)*z^2

The regression runs but I get NA for the values of the coefficients and t-values etc. Is there anything wrong with my equation? For the quadratics, I only have datasets labelled z and y. Do I need to create new data sets that have all the values in x/y squared? If so how do I go about doing that in eviews?

Thanks

[startz]

Looks like you're missing some multiplication signs.