Sounds more like an accounting problem than a statistical problem...
WBW
__________________________________________________________________________
William B. Ware, Professor and Chair Educational Psychology,
CB# 3500 Measurement, and Evaluation
University of North Carolina PHONE (919)-962-7848
Chapel Hill, NC 27599-3500 FAX: (919)-962-1533
http://www.unc.edu/~wbware/ EMAIL: [EMAIL PROTECTED]
__________________________________________________________________________
On Tue, 13 Feb 2001, Joe Meyer wrote:
> I am trying to estimate how faculty salaries at my university are allocated
> by instructional level and academic discipline to estimate the actual cost
> of teaching a semester credit hour by instructional level and discipline. I
> developed a regression model with faculty teaching purely in specific
> academic disciplines as my observations. Actual salary is my dependent
> variable. Independent variables include lower-level credit hours taught,
> upper-level credit hours taught, masters-level credit hours taught, doctoral
> credit hours taught, total students taught, and dummy variables for faculty
> rank, tenure status, and academic discipline. My original idea was to
> either:
>
> 1) use dummy variables for instructional levels, or
>
> 2) plug in lower-, upper-, and masters-level credit hour data one at a time
> to get separate estimates for each level and discipline.
>
> The dummy variable idea will not work, because I do not know what amount of
> each salary is spent at each level for my dependent variable. And, I will
> double count the estimators for tenure status, faculty rank, and discipline
> if I just plug credit hour data for each of the different instructional
> levels into the model while using zeros for other levels of instruction to
> get a prediction for each level. Is there a way to predict the salary cost
> by instructional level and discipline without fitting the model only on
> faculty who are teaching purely in one discipline and purely at one
> instructional level? I can do that, but I am concerned that such faculty
> would not be very representative of the population. I am not too worried
> about fitting the regression model to faculty who teach in a single
> discipline, since most do this anyway, but am afraid that limiting to
> faculty who teach at a particular level will skew the results.
>
> Thanks!
> Joe Meyer
>
>
>
>
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