Dear Users,
I'm estimating a survival analysis parametric model.
The dataset includes different countries, so I have introduced a dummy for each country.
Now, I would like to introduce frailty shared at country level in my model, after having removed the dummies for country: does it make any sense, or are the frailty parameters simply going to "replace" the dummies?
I other words: introducing in my model
-country dummy or
-no country dummy + frailty (shared are country level)
are equivalent procedure?
Many thanks,
Vinicio
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