Concertation (1) or Negotiation: More than a Semantic Difference. Some Reflections about Lessons from the Cases of Mercosur and EU Concertation or Negotiation More than a Semantic Difference. Some Reflections about Lessons from the Cases of Mercosur and EU.pdf Author(s) PEÑA Félix Keyword(s) European Union Mercosur Regional Integration International Relations FTAA National Interest NAFTA Sovereignty Institutionalization Publication Name International Negotiation Year of Publication 2007