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(0.3502 )
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(0
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k 1.0000 0.5725 0.8071 0.8787
( 0.0001 ) ** (0.0001) ** (0.0001) **
a
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(
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1990) '''~H'i!q:.~I*;fiIJ~(f:Jt&j!-slHU~~I*' j'fjftW~~f*~;fiIJ~z~~" , 'A'AA.A.1J iI:,lflr..,.lift-t.liaSc.
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~A'!r.,
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