More evidence has to be collected before we can produce robust stylised facts. 13  See, for example, Richard Clarida, Jordi Gali and Mark Gertler (1999), “The Science of Monetary Policy: A New Keynesian Perspective”, Journal of Economic Literature, American Economic Association, vol. 37(4), pages 1661–1707, December.
14  See Stephan Fahr, Roberto Motto, Massimo Rostagno, Frank Smets and Oreste Tristani (2011), “A monetary policy strategy in good and bad times: lessons from the recent past”, Working Paper Series, No 1336, European Central Bank. 15  Fahr et al. (2011), op. cit.