[Gretl-users] R: R: R: R: Restriction on model coefficients

Thank you all for the time spending to help me, and I apologize for my ignorance in econometrics and in gretl use (I have been using it for two months :-) ). Yes, no one error came out, but just a value zero for the variable as you already said. Now I'm going to try the solution proposed by Professor Cottrell, and in case of further problems I'm going to send you thee gdt file. Thank you once again, Carlo Maria Petrangelo -----Messaggio originale----- Da: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] Per conto di Allin Cottrell Inviato: martedì 9 febbraio 2016 16:16 A: Gretl list Oggetto: Re: [Gretl-users] R: R: R: Restriction on model coefficients On Tue, 9 Feb 2016, Carlo Maria Petrangelo wrote: Please read the documentation for the "restrict" command. When using the simplest method (which you are attempting) the restriction must take the form of a linear combination of parameters on the left and a scalar value on the right. Putting your restriction into something resembling this form we get (b4-b2)/(1-b3) = -0.012846691 but since this is nonlinear you actually have to use the "rfunc" form of the command, as in function matrix my_restrict (const matrix b) matrix v = (b[4]-b[2])/(1-b[3]) + 0.012846691 return v end function restrict wage rfunc = my_restrict end restrict gretl will then use the delta method to evaluate the test. Allin Cottrell _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users