I wrote a simple LP model. Some of the constraints are binding. I am

supposed to get Marginal Values (or shadow prices) for those binding

constraints. But I do not see any in LP solution. Should I write the

dual to find the shadow values?

Simple LP or NLP gives me shadow values for constraints that are not

binding; there are marginal values for variables that are NOT in the

final solution.

Can you please give me pointers on interpreting marginal values in

GAMS output, and how the marginal values are computed?

Thanks

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