Leben, Charles Keywords: Foreign direct investment | State contracts | Law of contracts | Private international law | International arbitration | Mots clefs: Investissement | Contrats d'Etat | Droit des obligations | Droit international privé | Arbitrage international | ABSTRACT A contract of State, explains Professor Leben, is an official report drawn up between the State and a foreign body with regards to an international economic operation, that generally, but not necessarily, concerns an investment. This matter has evolved conside…