The debate on the underlying causes of the decline of interest rates to historically low levels is ongoing both in academia and among policy makers. Several explanations have been put forward, ranging from those citing real and structural factors to those underscoring the importance of cyclical and financial phenomena.
However, the empirical evidence regarding their relative importance is still limited. These different but complementary views can be framed around the concept of the natural rate of interest and the monetary transmission mechanism.
The low interest rate environment that still characterizes advanced economies raises important questions regarding the implications for monetary policy in the medium- and long-run. Our work provides a systematic outline of the potential changes to monetary policy strategies that could ensue.
