This program "mrtmge_cde.gms" written in MPSGE is the CGE model with a CDE system.  It needs to be placed inside
the subdirectory "model" of GTAP8inGAMS.  To run it, under the DOS command prompt, type "gams mrtmge_cde".  The
environment variables "ds" can overwrite the default database setting (eppaf_02.gdx), "wt" with a default value of 1
controls the weight w_i presented in Section 3.1 (wt=0 => w_i=theta_i; wt=1 => w_i=1/n), and "step" with a default value of 0
controls the shock of the counterfactual simulation.