I am trying to forecast flows (or sales), using US macro-economic indicators. I have used PROC UCM and PROC VARMAX for this in the past. However, I can also see other PROCs available in SAS (PROC FORECAST, PROC ARIMA etc.). How do I select the right PROC (model) for this? Should I be using VARMAX or ARIMAX, as the indep vars contain the exogenous vars, i.e. macro-economic indicators? If NO, then what should I use; if YES then which model in VARMAX be most suitable? Thanks in advance! ... View more

How many observations will be there in output dataset temp? data temp; x=4; if x=5 then do; y=2; output; end; run; a) 1 b) 2 c) 0 d) 3 Ans: c   Is the reason for this answer that as OUTPUT has been invoked, output will only be given if the condition is true and never otherwise? ... View more