Data often take the form of ordered categories. For instance, in education, test results are often reported as grades. Where a hierarchical structure exists for the data, multilevel modelling of such ordered categorisations can be carried out using macros in MLwiN. The ordered categorisation can be seen as the realisation of an unknown underlying latent variable. A link function is used to rela...

The authors consider the problem of testing the validity of the logistic regression model using a random sample. Given the values of the response variable, they observe that the sample actually consists of two independent subsets of observations whose density ratio has a known parametric form when the model is true. They are thus led to propose a generalized moments specification test in detail...