Folks

I am estimating a simple non-linear model using NL. I have carefully read the documentation on NL but there is an issue I have been unable to resolve: NL uses least squares to estimate the parameters. But NL also produces Log-Likelihood, BIC, and AIC. How are these values, particularly Log-Likelihood computed? Can one still do likelihood ratio test and the likes?

This is my first post and I hope I am not asking something trivial!

Thank you.

Cyrus