Testing for unit roots in nonlinear heterogeneous panels with smoothly changing trends: an application to Scandinavian unemployment rates
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2001 ◽
Vol 12
(3)
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pp. 273-282
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2011 ◽
Vol 6
(2)
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Keyword(s):
2003 ◽
Vol 115
(1)
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pp. 53-74
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