Dear gretl users and experts, I am shifting part of my (formerly EViews-based) teaching material into gretl for a newly designed undergraduate course. One of the things I intended to do was to run a little Monte Carlo study to explain the concept of simulation. I used the code from the E-Book by Lee Adkins: open "c:\Program Files\gretl\data\poe\food.gdt" set seed 3213798 loop 100 -- progressive genr u = 88*normal() genr y1 = 80 + 10*x + u ols y1 const x genr b1 = $coeff(const) genr b2 = $coeff(x) genr s1 = $stderr(const) genr s2 = $stderr(x) # 2.024 is the .025 critical value from the t(38) distribution genr c1L = b1 - 2.024*s1 genr c1R = b1 + 2.024*s1 genr c2L = b2 - 2.024*s2 genr c2R = b2 + 2.024*s2 genr sigma = $sigma genr sig2 = sigma*sigma print b1 print b2 store cicoeff.gdt b1 b2 s1 s2 sig2 c1L c1R c2L c2R endloop Unfortunately gretl (newly installed, new version) crashes with an „internal error“ – but I had no chance to see why. The program is shut down. Help is very welcome. Kind regards, Ulrich Fritsche ------------------------------------------------------------------------ _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users

Fritsche, Ulrich schrieb: > I am shifting part of my (formerly EViews-based) teaching material into > gretl for a newly designed undergraduate course. One of the things I > intended to do was to run a little Monte Carlo study to explain the > concept of simulation. > > I used the code from the E-Book by Lee Adkins:

> open "c:\Program Files\gretl\data\poe\food.gdt" > set seed 3213798 > loop 100 -- progressive

Hi Uli, I'm just guessing, but many variables here do not seem to be series but scalar variables. AFAIK you can save those to a gretl "session" (.gretl), but not to a datafile (.gdt).