El Marco Te 3rico de la Pol -tica Monetaria

This paper reviews the recent literature on monetary policy rules. In particular, we discuss the theoretical framework underlying different monetary policy strategies. Currently, many central banks are imple-menting a scheme of monetary policy where the main instrument and indicator of it, is a short-run interest rate. In this scheme monetary aggregates have no place. Since this point of view, the well known Monetary Theory of Nominal Income (MTNI) seems to be obsolete. In this paper we analyze how far of this approach –the MTNI- has moved the practice of monetay policy. In particular, we discuss the theoretical framework of the so called “new keynesian synthesis".