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First Author:
 
Tetsuo Ono
Graduate School of Economics, Osaka University
tono@econ.osaka-u.ac.jp
 
1-7, Machikaneyama
Toyonaka, 560-0043, Japan
 
 
 

Second Author:

Ryo Arawatari
Graduate School of Economics, Osaka University
ege001ar@mail2.econ.osaka-u.ac.jp
 
1-7, Machikaneyama
Toyonaka, 560-0043, Japan