Fair machine learning regression models which take sensitive attributes into account in
model estimation. Currently implementing Komiyama et al. (2018)
< http://proceedings.mlr.press/v80/komiyama18a/komiyama18a.pdf>, Zafar et al.
(2019) < https://www.jmlr.org/papers/volume20/18-262/18-262.pdf> and my own
approach from Scutari, Panero and Proissl (2022)