mutualinf

The Mutual Information Index (M) introduced to social science literature by Theil and Finizza (1971) doi:10.1080/0022250X.1971.9989795 is a multigroup segregation measure that is highly decomposable and that according to Frankel and Volij (2011) doi:10.1016/j.jet.2010.10.008 and Mora and Ruiz-Castillo (2011) doi:10.1111/j.1467-9531.2011.01237.x satisfies the Strong Unit Decomposability and Strong Group Decomposability properties. This package allows computing and decomposing the total index value into its "between" and "within" terms. These last terms can also be decomposed into their contributions, either by group or unit characteristics. The factors that produce each "within" term can also be displayed at the user's request. The results can be computed considering a variable or sets of variables that define separate clusters.