st: syntax for nested two-factor ANOVA

["Erick Turner" <turnere@ohsu.edu>]

I have been puzzling through the examples on nested ANOVAs given in  
the manual, but I think my model is somewhat different from those. I  
could use help setting up the proper command syntax.

My data structure is this:

My DV is "testresult" (continuous)
IVs are all categorical:  "brand" is nested within "company", but the  
IV of main interest is "keep" (1 or 0, for sold or discarded).

So I want to see whether the "keep rate" is affected significantly  
and primarily by testresult, after controlling for the brand and the  
company making that brand.

I would expect there should be error terms for testresult*brand and/ 
or testresult*company.

Related question: would this employ a sequential sum of squares  
rather than a partial sum of squares, entering in the "confounds"  
first and then IV of key interest last?

Below is my confused attempt at a command and the result, which only  
yields a single F value, that being for the whole model, and no F  
values for the factors.

anova testresult brand company keep brand*keep company*keep / brand| 
company, sequential

                           Number of obs =      89     R-squared      
=  0.3971
                           Root MSE      = .204223     Adj R-squared  
=  0.2081

                  Source |    Seq. SS     df       MS            
F     Prob > F
           -------------- 
+----------------------------------------------------
                   Model |  1.84058059    21  .087646695        
2.10     0.0116
                         |
                   brand |   .69112847    11  .062829861
                 company |           0     0
                    keep |  .905309904     1  .905309904
              brand*keep |  .244142211     9  .027126912
            company*keep |           0     0
           brand|company |           0     0
           -------------- 
+----------------------------------------------------
                         |
                Residual |  2.79437683    67  .041707117
           -------------- 
+----------------------------------------------------
                   Total |  4.63495741    88  .052669971

------------------------

Thanks in advance for help with the proper syntax for what I'm trying  
to do.

Erick



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