This function finds the boundary of the identified set in one specified direction using the AS test and Newton's method.
AS_bounds(start, Yp, Xb, N_max = 30, tol = 10^(-4), tuningParam = NULL)
a list containing, in order: - the value of estimated radial function in this direction - value of the objective function - the number of iterations
the starting points for the bissection method
the observations of the outcome variable.
the observations of the noncommon regressor (possibly conditional on Xc).
the maximal number of iterations. Default is 30.
the tolerance of the method. Default is e-4.
the list of tuning parameters. For the details see the function "test" in the package RationalExp.