[R] constructing a self-starting non-linear model

[Irene Mantzouni]

Dear all,
 
I am trying to define a selfStart function for a non-linear model, which is a log-transformed SSmicmen model with multiplicative errors and so it is required to make them additive:
 
log(y)=log(a)+log(x)-log(1+x/b)
 
 
Any ideas about how to use the "peeling" method to derive the "initial" argument and get the initial values?
 
Thank you for being always there!:)
 
Irene