linear constraints for nonlinear model in Mata, thx

[Huan Gao]

In a non-linear equation:

X*({b}*Y+{b1}*C)

where X is a sort of unobservable variable which has to be parametrized as:

X = {c}*A + {c1}*B

where A and B are observable variables.
Also, X is required to be non-negative: X >=0, which means ({b}*Y+{b1}*C) >=0

Anyone knows how to add this constrains in the Mata optimization?

Many thanks

[Marcelo Magalhaes]

Hi Huan Gao,
I'm facing a similar problem and I've been looking for help too. Did you find something that could help in mata?
Best, Marcelo