You will find information about multinational corporations in here.

Trading blocs A regional trading bloc is a group of countries within a geographical region that protect themselves from imports from non-members. Trading blocs are a form of economic integration, and increasingly shape the pattern of world trade.

The Effects of Globalization on Working Conditions: Like many other developing countries, El Salvador's experience with globalization has been characterized by increases in foreign investment and total trade in the last 15 years. Also like other developing countries, these changes have been concentrated in relatively few sectors.

Benefit from FTA - The Salvadoran government had proclaimed that from the moment of its entry into force, the free trade agreement with the United States would boost the local economy, creating thousands of jobs, so that even street vendors would be exporting their typical snacks. But nearly two years later, the economic paradise has yet to arrive.

(USA Dept of Commerce). Have have to browse a bit to find ES info. There is a link on CAVTA-DR