I have been running regressions under the pretense that the colon acts as a 'root call.' However when I attempted to verify this assumption I found that my programs were not equivalently modelling the data. I have included sample program code and their respective results. Does anyone have any ideas? Am I accidentally programming a canonical analysis?
model risk_:=male age_cat ...;
risk_radon: R2=.5239; F=1.10
risk_lead: R2=.6433; F=1.80
model risk_radon=male age_cat ...;
model risk_lead=male age_cat ...;
risk_radon: R2=.5930; F=1.26
risk_lead: R2=.6821; F=1.86