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. 2022 Aug 26;172:29–39. doi: 10.1016/j.inteco.2022.08.003

Table 3.

Results of long memory tests.

Data analyzed Sample size (weeks) Model Selected d Std. Error Interval I(d)
Long memory test
Heavy Fuel Oil 120 ARFIMA (2, d, 2) 0.79 0.1050238 [0.62, 0.96] I(d)
Bloomberg Commodity Index 120 ARFIMA (2, d, 2) 0.96 0.1186170 [0.76, 1.16] I(1)
Baltic Dry Index 120 ARFIMA (2, d, 1) 0.53 0.283567 [-0.11, 1.17] I(0), I(1)
Harpex Shipping Index 120 ARFIMA (1, d, 1) 1.47 0.0441022 [1.40, 1.54] I(d > 1)
Shanghai Shipping Exchange Containerized Freight Index 120 ARFIMA (2, d, 2) 1.42 0.1203744 [1.22, 1.62] I(d > 1)