Table 4.
Outcome and treatment effect results of IPWRA models for vaccination adoption
| Outcome (GM/cow) model | |||
|---|---|---|---|
| (0 or 1) | (2 or 3) | (> 3) | |
| Herd size | 0.59 (0.59) | 1.91***(0.60) | 0.92**(0.46) |
| DSR | 169.79***(53.74) | 58.45(67.73) | 60.63 (50.45) |
| Specialization (base: Low) | |||
| Medium | –53.82 (66.19) | 108.39 (71.33) | 57.83 (66.29) |
| High | –168.16**(73.83) | 62.06 (64.07) | 59.84 (50.55) |
| Feed use | 29.31**(11.67) | 72.62***(18.01) | –1.23 (13.43) |
| SCC | –1.22***(0.38) | –0.38(0.32) | –0.84*(0.47) |
| Region (base: Northwest) | |||
| East midlands | –81.38(113.50) | –21.85(97.89) | 182.71**(89.44) |
| South | –34.23(66.42) | –1.58(63.68) | 182.60**(72.96) |
| Treatment (vaccination adoption) modela | |||
| Herd size | 0.02***(0.01) | 0.03***(0.01) | |
| DSR | –0.70*(0.40) | –0.23(0.45) | |
| Feed use | –0.19***(0.06) | –0.16**(0.07) | |
| SCC | –0.003(0.00) | –0.01***(0.00) | |
| Debt to asset ratio | –0.07**(0.03) | –0.04*(0.02) | |
| Specialization (base: Low) | |||
| Medium | 1.03**(0.44) | 0.83*(0.46) | |
| High | 0.56 (0.41) | 0.34(0.44) | |
| Age | 0.02(0.02) | 0.01(0.02) | |
| Household | –0.02(0.13) | –0.06(0.13) | |
| Region (base: Northwest) | |||
| East midlands | –0.53(0.58) | 0.42(0.71) | |
| South | 0.24(0.47) | 1.61***(0.54) | |
| Observations (n=263) | |||
Notes: Estimates based on a doubly robust treatment effect using IPWRA estimator.
Base category is model 1 (0 or 1).
Robust standard error in parenthesis; Significance level: ***P < 0.01, **P < 0.05, *P < 0.10