•  The first channel and most widely studied and understood channel of monetary policy transmission relies on the link between changes in the short-term nominal interest rate (induced by changes in the policy rate) and the long-term real interest rate that ultimately affect components of aggregate demand such as consumption and investment in an economy.
The first lesson is that central banks can and should take responsibility for delivering low and stable inflation. It may seem strange now that central bankers and others once needed convincing on these two fronts, but as former Chairman Ben Bernanke has shown, both propositions were widely questioned during the Great Inflation period.1 Today, we regard these questions as settled.