Hi all,
I've got a question when conducting a path analysis.

I've used one sample group and created three different path analysis models (which are mostly the same, except for one mediator.)

To make my questions clear, the three models are illustrated below:

1)

a---> b1--->c (dependent variable=continuous)

2)

a---> b2--->c

3)
a---> b3--->c


Please note that I'm using the same data (my population in three models are the same, the dependent variables are the same.) What is different is that I've used different variable construction when adopting the "b" mediator.

Now, my question is, after running the the models respectively, how can I test the significance of the differences in coefficients of b1-->c, b2-->c, and b3-->c?

Many thanks in advance.


best,
Clara