AS_bounds               This function finds the boundary of the
                        identified set in one specified direction using
                        the AS test and Newton's method.
AStest                  This function computes the AS test using DGM
                        implementation in the package RationalExp
DGM_bounds              This function compute the DGM bounds for all
                        the different coefficients.
DGM_bounds_test         This function compute the DGM bounds for all
                        the different coefficients, adapted to the
                        point identification test.
Variance_bounds         Function to compute the variance bounds for Xnc
compute_bnds_betac      Function to compute the bounds on the
                        coefficients of the common regressors.
compute_constraints     Compute the indexes of the values of the common
                        regressors Xc used in the various shape
                        constraints
compute_radial          Function to compute the DGM bounds on the
                        noncommon regressor Xnc
compute_radial_test     Function to compute the DGM bounds on the
                        noncommon regressor Xnc, adapted to the point
                        identification test.
compute_ratio           Function to compute the main statistic for the
                        point estimate
compute_ratio_variance
                        Function to compute the variance bounds
compute_stat_variance   Function to compute the Variance bounds on the
                        noncommon regressor Xnc
compute_support         Compute the support function for the
                        projections of the identified set
compute_support_paral   Function to minimize to compute the function
                        sigma for the projections of the identified set
create_values           Function to create the matrix of the support
                        points for the common regressors Xc
ewcdf                   Compute the weighted empirical cumulative
                        distribution
objective_support       Internal function to minimize to compute the
                        function sigma for the projections of the
                        identified set
point_ident_test        Function performing the test of point
                        identification on a validation sample.
regCombin               Function computing all the different bounds :
                        DGM and/or Variance
regCombin_profile       Computing the DGM bounds for different values
                        of epsilon, proportional to the data-driven
                        selected one
sampling_rule           The subsampling rule
select_epsilon          Function for the data-driven selection of the
                        epsilon tuning parameter
select_epsilon_test     Function for the data-driven selection of the
                        epsilon tuning parameter, adapted to the point
                        identification test.
summary_regCombin       Produce the final summary table for the output
                        of the felogit function
tabulate_values         Function to tabulate the values the common
                        regressors Xc whatever the dimension.
