“…Under a fixed regime, there are no expected variations in exchange rates, and, therefore, there is no room to sustain autonomous monetary policy. This is what is known as macroeconomic Trilemma (Obstfeld and Taylor, 1998), the Impossible Trinity (Frankel et al, 2001) or the Trilogy (Reinhart and Rogoff, 2004), terms all used to refer to the impossibility of simultaneously combining a fixed exchange rate, capital mobility and an activist monetary policy.…”