Beta of 0 and p-value of 1

[carmen256]

Hello,

I am estimating a 2 stages least squares model. My first stage is fine ( strong instrument) but my second stage gives my coëfficiënt in which I am interested a beta of 0 and a p-value of 1. No matter what dependent variable I use the beta is Always 0 with a p-value of 1.

Does someone know why this the case? Or what could be wrong with my data that causes this?

Thanks in advance!

 

[hlsmith]

Please define what you mean by 2 stage least squares model.

Do you know that there really is a relationship?

 

[Dason]

What program are you using?

 

[spunky]

Please define what you mean by 2 stage least squares model.

hlsmith:

http://pic.dhe.ibm.com/infocenter/s...ic=/com.ibm.spss.statistics.help/idh_tsls.htm

2SLS (2 Stages Least Squares) is one of the most flexible and basic models that can handle endogeneity (and also the stepping point for the development of Structural Equation Models, )