Compute the model matrix for RUM
specific stuff compared to the model.matrix.dfidx method which simply applies the Formula method
## S3 method for class 'dfidx_mlogit' model.matrix(object, ..., lhs = NULL, rhs = 1, dot = "separate")
object |
the object |
..., lhs, rhs, dot |
see the |
Yves Croissant
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