Goodness-of-Fit Tests for Ordinal Regression Models // Provides goodness-of-fit tests for ordinal regression models, including the Fagerland-Hosmer ordinal test, reproducing same output as 'Stata'. Supports polr(), vglm(), and binary glm() models. See Fagerland and Hosmer (2013) doi:10.1002/sim.5645 and Fagerland and Hosmer (2017) doi:10.1177/1536867X1701700308 for details.