The "black box" of the interest rate channel of monetary policy

In the economic literature authors believe that central banks manage long-term interest rates on loans through the short-term money market interest rate in order to maintain price stability and balanced economic growth. However, macroeconomic theory tells extremely sparingly about the interest rate channel of monetary policy. In general terms, it conducts changes through a term premium and expectations in the government securities market. In applied research, economists only observe the final reaction of lending rates to the non-financial sector. Economists traditionally believe that the interest rate channel requires a developed financial sector. In some cases, in particular, at zero rates or in a small open economy that depends on the exchange rate, the interest rate channel works poorly. However, its effectiveness can be maintained without developed financial markets. The answer is the pricing of banking loans.