Chapter 13 | Exercise 1
Using the data set let from Rling, fit an mlogit model with allow as the reference level.
a.
Which predictors are significant?
b.
Compare the coefficients with the ones from the model m.let. Are they similar?
> library(Rling); library(mlogit)
> data(let)
> let1 <- mlogit.data(let, shape = "wide", choice = "Verb")
> m.let.ex <- mlogit(Verb ~ 1 | Year + Reg + Permitter + Imper, data = let1, reflevel = 1)
> summary(m.let.ex)
Significant predictors:
- permit:Year, b = –0.12
- let:PermitterInanim, b = –2.6
- let:PermitterUndef, b = –1.27
- let:ImperYes, b = 3.08
the absolute values of the coefficients with let are the same, but the sign is opposite.