Two-Way Dimensional Dependence

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When dependence is introduced through any of the following structures, the model compiler assumes that two-way dimensional dependence occurs:

• A two-way dimensional dependence can occur when you use an aggregation function, such as AVERAGE, TOTAL, ANY, or COUNT.

  Opr.Income = Gross.Margin -
     (TOTAL(Marketing + Selling + R.D))
  Marketing = LAG(Opr.Income, 1, month)
  

• A two-way dimensional dependence can occur when you use a time-series function that requires a time-period argument, such as CUMSUM or LAG (except for the specific functions and conditions described in "One-Way Dimensional Dependence".

• A two-way dimensional dependence also can occur when you use a financial function, such as DEPRSL or NPV.

  A cyclic dependence across a time dimension that you introduce through a loan or depreciation function may cause unexpected results. The loan functions include FINTSCHED, FPMTSCHED, VINTSCHED, and VPMTSCHED. The depreciation functions include DEPRDECL, DEPRDECLSW, DEPRSL, and DEPRSOYD.