Journal of Osaka University of Economics
Online ISSN : 2433-5681
Print ISSN : 0474-7909
ISSN-L : 0474-7909
[title in Japanese]
Hidetada KusumotoNoriyasu Mitsui
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JOURNAL OPEN ACCESS

2019 Volume 70 Issue 6 Pages 7-

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© 2019 Osaka University Of Economics Institute
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