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Table 6 OLS regression of attributes affecting willingness to pay for digestate
| Attributes included in the models | T1 | T2 | T3 | T4a | T4b |
|---|---|---|---|---|---|
| Const. | 11.774 (0.0001) *** | 9.4533 (0.0001) *** | 2.8795 (0.0001) *** | 3.9313 (0.0002) *** | 13.417 (0.0000) *** |
| Organic origin | 0.4975 (0.4212) | 0.3214 (0.7042) | − 0.1993 (0.5890) | − 0.2564 (0.6120) | − 2.6421 (0.0084) *** |
| Soil fertility | 0.9465 (0.3159) | − 0.2672 (0.6540) | 0.3260 (0.2872) | − 0.1544 (0.7044) | − 2.2206 (0.0001) *** |
| Environmental sustainability | − 0.4454 (0.6843) | − 1.2449 (0.1311) | − 0.4731 (0.0629) * | − 0.57858 (0.1294) | − 2.1899 (0.0002) *** |
| Safety | − 1.8563 (0.0859) * | − 2.8498 (0.0016) *** | − 0.6556 (0.2117) | − 0.4310 (0.3795) | − 3.1472 (0.0023) *** |
| Price | − 0.5677 (0.4405) | − 0.2078 (0.7163) | − 0.7885 (0.0015) *** | − 0.5360 (0.2100) | − 1.8548 (0.0046) *** |
| Natural product | 0.3112 (0.7855) | 3.1440 (0.0028) *** | 0.4772 (0.3047) | 1.1918 (0.0289) ** | − 0.3263 (0.7267) |
| Microbial activity | 0.1671 (0.8206) | − 0.7236 (0.0894) * | 0.2637 (0.5272) | − 0.0036 (0.9878) | − 1.0926 (0.0170) ** |
| R2 = 0.23 | R2 = 0.75 | R2 = 0.37 | R2 = 0.30 | R2 = 0.40 | |
| Adjusted R2 = 0.12 | Adjusted R2 = 0.72 | Adjusted R2 = 0.27 | Adjusted R2 = 0.20 | Adjusted R2 = 0.31 |
