# Rank-1 stereotype model of Anderson (1984)
pneumo <- transform(pneumo, let = log(exposure.time),
x3 = runif(nrow(pneumo))) # x3 is unrelated
fit <- rrvglm(cbind(normal, mild, severe) ~ let + x3,
multinomial, data = pneumo, Rank = 1)
Coef(fit)
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