hi,

i am new here and wanted to know, before i start learning yet another statistical package:

I want to estimate a system of equations that is non linear in the parameters, using 3SLS.  However, i will probably have to constrain some of the parameters to be between, say, zero and one.  Is this possible with R, and better, is this easy?  If so, since i am an absolute beginner, any pointers where to start would be greatly appreciated.

Bjorn

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