ABSTRACT
Introduction To most people 'trade barriers' signify controls over imports that impede or bar access to markets. Since World War II, trade liberalisation efforts have been directed to reducing them ~ with considerable success under the aegis of the GATT. Today, however, the oil and food crises and the surge of world-wide inflationary pressures have focused attention on the obverse problem: controls over exports that impede or bar access to supplies, thus threatening an open world.
