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Comparison of covariance matrices between groups

##### R-code for closed likelihood-ratio tests of similarity between Covariance Matrices

##### R-code for common principal components analysis based on leptokurtic-normal groups

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Rasch Models

##### R-code for Joint Maximum Likelihood estimation of Rasch models (with and without Firth's correction)

##### R-code for Fuzzy Joint Maximum Likelihood Estimation of Rasch models

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Serial Dependence

##### R-code for testing serial independence

##### R-code for serial dependence diagrams

##### R-code for the KL-autodependogram

##### R-code for omnibus serial dependence diagrams