procedure to obtain multiplicative model?

[magalineven]

Does someone know which procedure to use to obtain a multiplicative model in SAS?
Thanks!

[Reeza]

Within time series analysis or some other context?

[magalineven]

In the context of estimating a marketshare at a certain moment. We have around 10 independent variables (price, promotion, ...).

[SteveDenham]

Recall that a multiplicative model is additive in the log space.  Consequently, procedures such as GENMOD, GEE, GLIMMIX, HPGENSELECT and TRANSREG in SAS/STAT, and X11, X13, ESM and ARIMA in SAS/ETS can be used to fit multiplicative models.  You should look through some of the worked examples in the documentation to see which might fit your needs.

SteveDenham

[Rick_SAS]

You can use PROC NLIN to define and solve multiplicative models.