Hi, guys!
I am trying to estimate a model with quadratic effects. Does anyone know how to define constrained models? I am following Ping´s (1995) suggestion to estimate quadratics which means to multiple observed values as in a moderating effect. But my problem is that Mr. Ping suggests to estime
ate a constrained quadratic effect model. I don´t know how to do this. Can anyone help me?
Cheers,
J. Lengler