Nested Logit Module | Salford Systems

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Product Overview

Nested Logit Module

Now deal with Violations of Indepence from Irrelevant Alternatives(IIA)the right way -- consistent, efficient, theoretically correct modeling!

Features of the nested LOGIT module include:

No limits on your nesting structure

Fit trees of any depth, any number of branches.
If you have sufficient RAM and hard disk space you can fit any model you care to specify, no matter how complex.

Flexible modeling

Provides straightforward way to describe your nesting structure.
Experiment with different types of trees easily.
Enables you to impose structural constraints
- Require the within-nest similarity parameter to be equal across selected nests

Pool different types of choice response data

Each response can have its own number of alternatives.
Each response can come from a different part of the tree.

Diagnostic statistics to help you decide on the right tree structure

Automatically tests for significant correlation of errors in each nest.
- No correlation suggests a nest can be merged to a higher level.
Automatically tests the entire nesting structure.
- Allows you to determine whether you can use ordinary Multinomial LOGIT or whether nesting is required.
User- specified joint tests enable you to drop a subset of nests (tree simplification).