Definitions of dummy-coded attribute variables
| COG | COC | |
|---|---|---|
| Selected as the best | ||
| Country of growing (COG) | 1 | 0 |
| Country of processing (COP) | 0 | 0 |
| Country of the company (COC) | 0 | 1 |
| Selected as the worst | ||
| Country of growing (COG) | −1 | 0 |
| Country of processing (COP) | 0 | 0 |
| Country of the company (COC) | 0 | −1 |
| Country of growing (COG) | 1 | 0 |
| Country of processing (COP) | 0 | 0 |
| Country of the company (COC) | 0 | 1 |
| Country of growing (COG) | −1 | 0 |
| Country of processing (COP) | 0 | 0 |
| Country of the company (COC) | 0 | −1 |
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