haberman


Haberman's example of a log-linear model (the no-three way interaction model) that lacks an MLE even though it has positive margins.


datasets

algstat provides functionality for algebraic statistics in R.
Current applications include exact inference in log-linear models for
contingency table data, analysis of ranked and partially ranked data, and
general purpose tools for multivariate polynomials, building on the mpoly
package. To aid in the process, algstat has ports to Macaulay2, Bertini,
LattE-integrale and 4ti2.

David Kahle

haberman: Haberman's Positive Margin no Three-way Interaction MLE

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