Test for the covariance matrix in time-varying coefficients panel data models with fixed effects
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2017 ◽
Vol 46
(2)
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pp. 267-284
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2020 ◽
Vol 49
(1)
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pp. 82-116
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2011 ◽
Vol 14
(3)
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pp. 387-408
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2020 ◽
Vol 20
(4)
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pp. 976-998
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