One example would be altering the composition of a central bank’s balance sheet so as to add a second policy instrument to changes in the targeted interest rate.
Jens Weidmann: The monetary union as a community of stability Speech by Dr Jens Weidmann, President of the Deutsche Bundesbank, at the Bundesbank’s parliamentary evening, Regional Office in Hamburg, Mecklenburg-West Pomerania and Schleswig-Holstein, Hamburg, 29 August 2013.