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Table 12 Variance decomposition of maize, copper and crude oil prices (2000 to 2021 data)

From: Effects of crude oil prices on copper and maize prices

Equation

Period

SE

Maize price

Copper price

Crude oil price

Maize price

1

0.06

100.00

0.00

0.00

6

0.16

97.90

1.62

0.49

12

0.20

87.69

9.64

2.67

18

0.23

73.92

20.76

5.32

24

0.26

61.52

30.98

7.50

Copper price

1

0.06

3.48

96.52

0.00

6

0.21

4.07

95.68

0.25

12

0.30

3.14

94.19

2.68

18

0.36

2.30

92.32

5.39

24

0.41

1.81

90.88

7.32

Crude oil price

1

0.09

2.22

13.72

84.06

6

0.25

8.24

35.21

56.55

12

0.30

11.76

45.70

42.54

18

0.33

12.16

52.30

35.54

24

0.36

11.22

56.82

31.96