Re: [Gretl-users] can i estimate SEMs using panel data via gretl

On Tue, 11 Aug 2009, Sven Schreiber wrote: > Allin Cottrell schrieb: >> On Mon, 10 Aug 2009, Allin Cottrell wrote (in response to >> Zhenzeng Young): >> >>> [T]he word "to" is used by gretl in constructing ranges of lags. >>> So my command to set up the list "sysvars" went wrong -- it was >>> confused by your variable named "to". My fix for issue this was >>> to make "to" a reserved word (that is, you are no longer allowed >>> to call a variable "to"). >> On second thoughts, there's no need to add "to" to the list of >> reserved words. By coding a bit smarter I've removed the >> ambiguity between "to" as variable name and "to" as lag range >> indicator. >> > nice and user-friendly effort of course, but isn't this very bug-prone? You have a point, but I think we're alright. I believe the following illustrates the toughest case for disambiguation, and we manage it OK. That is, L1 ends up holding 3 lags of QNC, while L2 holds the three variables "PRIME", "to" and "STOCK". open data9-7 series to = QNC list L1 = QNC(-1 to -3) list L2 = 4 to 6 list L1 print list L2 print On the other hand, even if we're bug-free in this respect, the command list L2 = 4 to 6 kind of looks as if it might produce a list holding vars 4, 5 and 6 (although that syntax is not in fact supported). So perhaps there's a case for banning "to" as a variable name for the sake of readibility in scripts?