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Table 3 One-sided tests of CV1 > CV2: between periods–within markets

From: Public buffer stocks as agricultural output price stabilization policy in Ghana

Market

Crop

Policy- off period CV

Policy-on period CV

Change in CV

Z-statistics

Techiman

Maize

22.10

15.01

7.09

5.220**

Techiman

Rice

16.77

4.97

11.80

9.172**

Tamale

Maize

19.47

6.28

13.19

11.488**

Tamale

Rice

22.61

7.43

15.18

4.810*

Ho

Maize

20.93

19.05

1.88

0.114

Ho

Rice

12.58

12.20

0.38

0.025

  1. **Significant at 1%; *Significant at 5%