Added external predictions for PLR model #204
Merged
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PLR extended by the option to use external predictions
Description
The PLR model was extended by the possibility to calculate causal effects from externally generated predictions. This has been implemented along the lines of the IRM model.
As with the IRM model, the _nuisance_est method has been adapted so that it offers the possibility of passing external predictions in the fit method of the parent class.
In addition, the unit tests for comparing the values calculated manually and in the package have been extended. These now also compare the results between predictions generated with nuisance learner inside the package or predictions generated outside.