power regression

  1. H

    Power function - finding if the slope is significant or not?

    Hi, I'm using power functions to look at a relationship between time and age and I need to be able to test whether or not the slope of this relationship is significant or not. I am using SYSTAT, but cannot find out how to run this and produce a p-value. Is this not possible to test at all...
  2. M

    Constant Elasticity Model

    I was wondering if anyone could please try to help me understand where I'm going wrong with the following logic: I have been trying to look at a simple model: y = x^b This can be transformed to log y = b*log(x) and differentiated w.r.t. x to get: (dy/dx)*(x/y) = b which I...