Table 11 Empirical results for the influencing factors of the biosecurity levels on farms
From: Status, evaluation, and influencing factors of biosecurity levels in pig farms in China
| Â | Multiple Linear Regression | Tobit Regression | ||
|---|---|---|---|---|
Coef | Std. Err | Coef | Std. Err | |
Biosecurity cost (Logarithm) | 0.0063** | (0.0023) | 0.0063** | (0.0022) |
The basic characteristics of farmers | ||||
 Gender | 0.0226* | (0.0114) | 0.0226* | (0.0110) |
 Age | -0.0007 | (0.0006) | -0.0007 | (0.0005) |
 Years of education | 0.0046** | (0.0016) | 0.0046** | (0.0015) |
 Technical training | 0.0402*** | (0.0113) | 0.0402*** | (0.0109) |
 Breeding years | -0.0007 | (0.0007) | -0.0007 | (0.0006) |
The characteristics of production and operation | ||||
 Degree of specialization | -0.0002 | (0.0002) | -0.0002 | (0.0002) |
 Breeding scale (Logarithm) | -0.0441*** | (0.0108) | -0.0441*** | (0.0104) |
 Square term of breeding scale | 0.0044*** | (0.0011) | 0.0044*** | (0.0010) |
 Number of farmers | 0.0115** | (0.0039) | 0.0115** | (0.0038) |
 Production organization form | 0.0342** | (0.0109) | 0.0342** | (0.0106) |
Production modes (compared with piglet breeding) | ||||
 Self-breeding | 0.0227 | (0.0209) | 0.0227 | (0.0202) |
 Commercial pig fattening | 0.0251 | (0.0221) | 0.0251 | (0.0213) |
 Whether ASF has occurred | 0.0079 | (0.0095) | 0.0079 | (0.0092) |
 Cognition on blocking difficulty | -0.0025 | (0.0048) | -0.0025 | (0.0046) |
 Area dummy variable | Control | Control | ||
 _cons | 0.4744*** | (0.0616) | 0.4744*** | (0.0594) |