By Chigira Hiroaki   in Applied Economics Letters

ISSN:1466-4291|15|9|693-696

Routledge Ltd‎(2008)‎

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By Chigira Hiroaki   Yamamoto Taku   in Communications in Statistics: Theory and Methods

ISSN:0361-0926|36|5|981-1003

Taylor & Francis Ltd‎(2007)‎

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