Internal function that is called by
krls to computes first differences for binary predictors in the X matrix. It would normally not be called by the user directly.
Object from call to
additional arguments to be passed to lower level functions
A object of class
krls where the derivatives, average derivatives, and the varinaces of the average derivatives are
replaced with the first differences for binary predictors. The binaryindicator is also updated and set to TRUE for binary predictors.
Jens Hainmueller (Stanford) and Chad Hazlett (MIT)
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