ardeshir

Hello, My name is Ardeshir and I have a master’s degree in traffic and transportation engineering. I have to admit that I am new and I don’t have a lot of information and experience in choice models. Right now I am working on a paper to study the heterogeneity in my statistical sample. My study has two alternatives (Pat and car) and I have used the MNL and mixed logit models to study the heterogeneity. The image attached illustrates the ML model outputs. I have 4 questions that I have mentioned below and I would be truly thankful to have your help and guidance: 1- What interpretations can I have from the output of my two models separately? 2- How can I find the mathematical procedure (formula) of heterogeneity by MNL and ML models in order to write them down in the method section of my paper? 3- How can I know that my overall model is statically significant by P-value and chi-squared? 4- Can I say that those parameters which have an unexpected sign are not statically significant? (as an example the value of heterogeneity for in-vehicle time x job trip purpose has a positive sign)