A colleague of mine found the following article which says that most statistical packages for non-linear models produce the marginal effect of an interaction term which does not equal the magnitude of the interaction effect.    http://www.sciencedirect.com/science/article/pii/S0165176503000326   Can anyone point me to resources as to how SAS handles this problem?   This is part of a broader discussion of how often we want our analytics team to use non-linear models.   Thanks,   Aran Canes ... View more

In the exam content tab of the Advanced Certification Exam Program it says the exam has Reduce programming time by developing reusable SAS programs which incorporate data step views, DATA steps that write SAS programs, and the FCMP procedure. Does anybody know what DATA steps that write SAS programs means or where I can find documentation on this subject? ... View more