Is There a Demand for Multiplying Trend Models?

In some particular cases, multiplicative models may still be needed. But i think the set of eight exponencs moting models that we give here is generic enough to be abe in a wide range of mothers. We don't thog exclude that a different subset, larger or smaller, could be more appropriate in particular cases. Show over all, across all of these data, what we propose works. And it has been shown that it has been quite representative.