On Tue, 17 May 2011, Daniela Tatiane dos Santos wrote: > I estimated a model with quadratic and linear adjustment, using > consumption as a function of income per capita. However, I would > like the adjustment was cubic. Then just add a cubic term? x_cubed = x^3 We can't have a menu item for each and every mathematical transformation: use /Add/Define new variable, or use the console, or a script. Allin Cottrell _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users