| Summary/Abstract |
The purpose of this paper is to analyze the defense interdependence between Japan and the United States (US) in the short and long run and to investigate whether Japan is a follower or a free rider of the “US” over the 1975–2009 period. Given that mutual aid between Japan and the US has been maintained, the empirical results suggest that Japanese defense has a stable relationship with US defense. Furthermore, the results reveal that Japan is not a free rider but rather a follower in the period under consideration.
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