Question (Kemp Wan theorem) Starting from a situation like that shown in where the three nations are symmetric in everything including the initial MFN tariff, suppose that Home and Partner form a customs union and lower their common tariff against Row to the point where the new, post-liberalization border price facing Row exporters is the same as it was before the liberalization ie. Show that this "Kemp-Wan" adjustment ensures that Home and Partner gain while RoW does not lose from this CU with CET reduction scheme