Dears

My problem is the following. I have data on income in both values and income intervals. Using a log likelihood for both sub

samples, I want to get parameters of the joint sample. My problem is how to define the income intervals in Gretl, and apply them to a

cumulative density function, normally distributed ( not standard cdf). I want to express the income intervals as a difference between cumulative density functions at each point. Any idea how to do that?? Hope I’m clear.

It is clear that I’m a beginner in Gratl.

Thanks in advance

Rezi