Policy Discussions on Output Gaps in Japan During the 1990s

The output gap, also known as the gross domestic product (GDP) gap, has long served as a guiding principle in economic policymaking. In Japan, it played a significant role in economic policy discussions from the late 1990s to the early 2000s. Nevertheless, its usefulness for real-time policymaking was a subject of debate. This chapter aims to provide an examination of the controversies surrounding the output gap during the aforementioned period. Upon thorough review and analysis, several noteworthy observations emerge regarding this debate. Firstly, these discussions delved into the complexities of output gap measurement and sought to uncover the true reasons behind economic recessions. Secondly, over the years, other advanced economies have drawn insights from Japan’s experience. In Europe, a campaign known as the “Campaign Against Nonsense Output Gap” aims to scrutinize the dependability of the output gap in policymaking and policy evaluations. Given the shared challenges faced by advanced economies, the lessons from Japan’s historical economic policy debates hold valuable significance and deserve ample attention.