Stiglitz also opposed the Transatlantic Trade and Investment Partnership (TTIP) trade deal between the European Union (EU) and the United States, and has argued that the United Kingdom should consider its withdrawal from the EU in the 2016 referendum on the matter if TTIP passes, saying that "the strictures imposed by TTIP would be sufficiently averse to the functioning of government that it would make me think over again about whether membership of the EU was a good idea".