data_efficient_portfolios_returns
                        Efficient portfolios returns
f_RSRL                  Function computing the RSRL or the RSRL
f_SR                    Function computing the Sharpe ratio or one of
                        its modified version
f_VaR                   Function computing Value-at-Risk and modified
                        Value-at-Risk
f_circular_bloc_bootstrap
                        Function computing a circular block bootstrap
f_diversification_measurement
                        Function computing portfolio diversification
                        measures
f_test_RSRL             Function computing coefficients and
                        significance levels of the RSRL and mRSRL
