This is the fourth edition of this Conference organised by the European Institute of the Mediterranean, with the support of the Banco de España, to discuss economic and financial matters in the Mediterranean region. The three previous editions were in Barcelona, in 2014 and 2017, and in Rabat in 2015, on that occasion with the support and hospitality of Bank Al-Maghrib. This conference is therefore beginning to take root as a successful meeting point between different actors with interests in the economic and financial developments in these countries. The exchange of ideas among a wide and diverse range of participants – including central bankers, public officials, academics, and representatives from the private sector and international organisations– in a friendly environment proved enormously fruitful in previous editions, as, I am sure, will be also the case this time. Let me also add that forums like this are particularly relevant for central banks, which in recent years have had to face deep-seated transformations in economic and financial relations globally. This new environment forces us to re-think the design and implementation of economic policies in order to better contribute to the progress of our society. I would also like to inform you that the Banco de España is preparing a seminar on central bank communication, the first of which is aimed at Mediterranean and Latin American countries, to be held in the spring of 2019.
Conventional policy options at the zero lower bound Conventional macroeconomic theory states that, when interest rates are at the zero lower bound, monetary policy becomes ineffective and economic policy action should concentrate on fiscal measures. In slide 1, the depiction of the economy using the standard IS/LM model summarises this point of view. As you can see, the economic situation is represented in terms of two key variables, the interest rate and output (or GDP). Economic equilibrium is represented by the intersection of the IS and LM curves. The first corresponds to the interest rate and GDP levels that balance savings and investment and the second represents the combinations of these two variables, which equilibrate the demand and supply of money. Expansionary monetary policy corresponds to pulling the LM curve to the right. When interest rates are at the lower bound, however, the LM curve is horizontal. At this point, pulling a horizontal to the right has absolutely no impact on the intersection of the IS and LM curves, and therefore on the equilibrium level of output. Conventional monetary policy hence becomes ineffective. Intuitively, if interest rates are at the zero lower bound they cannot be lowered further, yet it is precisely by lowering interest rates that monetary policy can stabilise the real economy. By contrast, it is at the zero lower bound that the potential benefits of fiscal policy are most significant. As the same diagram suggests, it is precisely when the LM curve is flat that it becomes most appealing to use fiscal policy.