02-15-2013 10:49 PM
I am trying to run a panel regression with a time series length of 157 (monthly observations) for 12 cross sections (different countries). Response and explanatory variables are all numeric. To identify the cross section I included a variable (column) of the international country abbreviations (e.g. CL for Chile, CN for China and so forth). When I submit the proc panel code, the following warning appears but SAS proceeds with the procedure:
"WARNING: Invalid data passed to SCALE. GROUP must be numeric."
proc panel data=dataset;
model y = x1 x2 x3 / fixtwo;
id country date;
Any help would be very much appreciated, as I am sort of lost in this matter.
Thanks a lot in advance
02-18-2013 12:57 PM
I don't use proc panel, but I suspect that the error occurs in the plotting routines. Try adding plots=none to the proc panel statement. - PG