| Total effect | Scale effect | Composition effect | Technique effect |
Two control zones | ||||
ΔCO2 | −6.9308* | −4.1531 | 2.4712*** | −5.2489** |
| (3.7876) | (4.0269) | (0.7716) | (2.1842) |
ΔSO2 | −7.0052*** | −6.9702*** | 1.0736** | −1.1086 |
| (2.0317) | (2.1601) | (0.4139) | (1.1716) |
ΔElectricity price | −0.0754 | −0.1357** | −0.0090 | 0.0693** |
| (0.0505) | (0.0536) | (0.0103) | (0.0291) |
Non-control zone | ||||
ΔCO2 | −3.1841*** | −3.5355*** | 0.6832*** | −0.3319 |
| (1.0471) | (0.7673) | (0.2487) | (0.7343) |
ΔSO2 | 1.3161 | −4.5976*** | 0.6319** | 5.2819*** |
| (1.0719) | (0.7854) | (0.2546) | (0.7516) |
ΔElectricity price | −0.0344 | −0.0032 | −0.0094 | −0.0219 |
| (0.0242) | (0.0177) | (0.0057) | (0.0169) |