### Question about NA in model result and endogenous variable

Posted:

**Thu Feb 11, 2016 5:45 pm**I try to solve for this model

I use the instrument variable to solve for each equation.

m_s, p and gov are all exogenous variables while others are endogenous variables.

Now the problem is that there are some NA in results and r_l is an exogenous variable rather than endogenous variable.

Also, p suppose to be an exogenous variable but it does not show in the model.

Thank you so much and I really appreciate your help.

I use the instrument variable to solve for each equation.

m_s, p and gov are all exogenous variables while others are endogenous variables.

Now the problem is that there are some NA in results and r_l is an exogenous variable rather than endogenous variable.

Also, p suppose to be an exogenous variable but it does not show in the model.

Thank you so much and I really appreciate your help.