In a letter to the European Commissioner for Trade, Karel De Gucht, Gabriel stated in March 2014 that “special investment-protection provisions are not required in an agreement between the E.U. and the U.S” on a Transatlantic Trade and Investment Partnership (TTIP). Instead, he later called for a public trade and investment court to replace the current system of private arbitration, and to enable appeals against arbitration rulings. Meanwhile, he has continuously warned against overblowing expectations for an economic boost from TTIP but maintained that the pact was needed to set high common standards for consumers. By August 2016, Gabriel said talks on TTIP had "de facto" failed.