Resampling approaches were the first techniques employed to compute a variance for the Gini coefficient. Few authors showed that Gini's coefficient measure can be obtained from a synthetic ordinary linear regression (OLS) based on the data and their ranks, thereby providing also with an exact...

We present a general framework for portfolio risk management in discrete time, based on a replicating martingale. This martingale is learned from a finite sample in a supervised setting. The model learns the features necessary for an effective low-dimensional representation, overcoming the curse...