A model for agreement on an ordinal response partitions beyond-chance agreement into that due to a baseline association and a main-diagonal increment. For ordered scores {u_a}, the model is

a. Show that this is a special case of quasi-symmetry and of quasi-association (10.29).

b. Find the likelihood equations and show that {µÌ‚_ab} and {n_ab} share the same marginal distributions, correlation, and prevalence of exact agreement.

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log Mab 3 A + A4 + л; + Ви, и, + d1(а %3D b).