According to Treasury Secretary Janet Yellen, it would be better to run the risk of excess than insufficiency. In addition, the Federal Reserve's new monetary policy regime puts the 2% inflation target as an average, not as a ceiling forcing monetary policy to act to prevent it in advance. After a long period of inflation below 2%, even in years with low unemployment and interest rates on the floor, monetary authorities can afford to wait some time with above-average inflation until they are compelled to pull the brake.