The 1 reference context in paper Christopher F. Baum, Mustafa Caglayan, Neslihan Ozkan (2002) “Sectoral Fluctuations in U.K. Firms' Investment Expenditures” / RePEc:boc:bocoec:520

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    We first examine, in Table 2, the contemporaneous correlation of growth in investment expenditures for ten basic sectors. For 4There were no rejections of the KPSS test’s null hypothesis of stationarity
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    (Kwiatkowski et al., 1992)
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    at any reasonable level of significance. 3 any sector, lack of significant correlation of its investment spending with that of other sectors may be considered as evidence against comovement of investment rates across sectors.
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