Assessments of the policy measures are diverse, in that some emphasize the positive effects of the measures while others cast doubt on the policy effects or claim that unexpected side effects were far too large. The controversy seems to suggest that it is difficult to grasp and foresee the size and channels of the policy effects in advance. B.
Effects of monetary policy measures: a comparison of traditional and unconventional policies  Is there a substantial difference between traditional and unconventional policies concerning monetary policy effects and their transmission channels?