The file adriana_bo_utils.gau contains utilities used by Honore and Lleras-Muney (2005) (PDF, PS). They are explained in util_expl.pdf or util_expl.ps.

adriana_bo_utils.gau calls utils.gau which has to be place in the same directory.

utils.gau calls either simplex1.so (under Linux) or sim_new.dll (under windows). utils.gau has to be modifies to refelect the location of those files.