Has China’s Pilot Policy of Water Ecological Civilization City Construction Reduced Water Pollution Intensity?
Abstract
:1. Introduction
2. Research Hypotheses
2.1. Primary Hypothesis
2.2. Mechanism Hypothesis
3. Material and Methods
3.1. Characteristics and Facts of Water Pollution Intensity
3.2. Model Construction and Data Description
3.2.1. Model Construction
3.2.2. Variable Measurement and Data Description
4. Results
4.1. Estimation Results
4.2. Parallel Trend Hypothesis Test
4.3. Robustness Test
4.3.1. Remeasurement of Dependent Variables
4.3.2. Exclusion of the Influence of Extreme Values
4.3.3. Considering the Impact of Other Policies
4.3.4. Placebo Test
4.3.5. PSM-DID Method
4.3.6. Addition of Control Variables
4.3.7. Considering Spatial Relevance
4.4. Mechanism Test
4.5. Heterogeneity Analysis
4.5.1. Time Heterogeneity
4.5.2. Regional Heterogeneity
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Stage | Year | First Batch of Pilot Cities | Stage | Year | Second Batch of Pilot Cities |
---|---|---|---|---|---|
Before pilot construction | 2008 | 46.6024 | Before pilot construction | 2008 | 54.0737 |
2009 | 38.3891 | 2009 | 39.8556 | ||
2010 | 32.6279 | 2010 | 35.1320 | ||
2011 | 29.5592 | 2011 | 31.2143 | ||
2012 | 26.2441 | 2012 | 24.8599 | ||
2013 | 24.6208 | 2013 | 23.3858 | ||
During pilot construction | 2014 | 20.5360 | 2014 | 22.6454 | |
2015 | 17.7066 | During pilot construction | 2015 | 21.1896 | |
2016 | 13.5545 | 2016 | 16.9695 | ||
After pilot completion | 2017 | 11.4937 | 2017 | 13.4877 | |
2018 | 10.1346 | After pilot completion | 2018 | 11.5625 | |
2019 | 9.1520 | 2019 | 10.2034 | ||
2020 | 8.8992 | 2020 | 9.4936 |
Variable | Maximum | Minimum | Mean | Standard Deviation | Number of Observations |
---|---|---|---|---|---|
Wp | 339.9897 | 0.1118 | 25.7001 | 24.7724 | 3679 |
Ws×Tm | 1 | 0 | 0.1679 | 0.3181 | 3679 |
Ur | 0.9276 | 0.1794 | 0.5393 | 0.1442 | 3679 |
Js | 70.5890 | 0.0086 | 1.7068 | 4.8179 | 3679 |
Jc | 0.8215 | 0.0012 | 0.2135 | 0.2864 | 3679 |
Fo | 187.3171 | 0.0034 | 5.9757 | 18.6836 | 3679 |
Variable | Model 1 | Model 2 | Model 3 | Model 4 |
---|---|---|---|---|
c | 2.4752 ** (2.0207) | 3.0026 ** (2.0845) | 2.7518 * (1.7632) | 2.6073 * (1.7429) |
Ws×Tm | −0.2118 *** (−2.8901) | −0.1619 *** (−3.7460) | −0.1454 *** (−3.1839) | −0.1241 ** (−2.1936) |
Ur | 0.0925 * (1.7871) | 0.0734 * (1.7515) | ||
Js | −0.1306 ** (−2.2187) | −0.1062 ** (−2.1358) | ||
Jc | 0.1512 ** (2.2005) | 0.1307 ** (2.2123) | ||
Fo | 0.0619 * (1.7134) | 0.0465 * (1.7049) | ||
Individual fixed effect | Yes | Yes | ||
Time fixed effect | Yes | Yes | ||
R2 | 0.6645 | 0.7124 | 0.7903 | 0.8636 |
F | 51.4723 *** | 52.9261 *** | 47.6358 *** | 41.2547 *** |
Variable | Remeasured Dependent Variable | Excluding Extreme Values | Considering Other Policies | Placebo Test | PSM-DID | Additional Control Variable | Considering Spatial Correlation | |
---|---|---|---|---|---|---|---|---|
False Policy | False Treatment Group | |||||||
c | 2.1458 ** (2.0641) | 2.4424 * (1.7236) | 3.1507 ** (2.3493) | 3.4255 *** (5.3029) | 2.1946 *** (3.2215) | 3.3903 ** (2.2374) | 2.6173 ** (2.1781) | 2.0952 ** (2.1178) |
Ws×Tm | −0.1502 ** (−2.1006) | −0.1003 *** (−4.5817) | −0.0718 ** (−2.2104) | −0.0946 (−1.1218) | −0.0139 (−1.3224) | −0.1137 *** (−3.5236) | −0.1051 ** (−1.9895) | −0.0935 * (−1.7749) |
Ws×Tm direct | −0.6214 *** (−3.1537) | |||||||
Ws×Tm indirect | −0.3346 ** (−2.0928) | |||||||
Control variable | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Individual fixed effect | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Time fixed effect | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
ρ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | 0.0521 *** |
R2 | 81.9039 | 79.6151 | 80.7433 | 85.7550 | 82.8031 | 83.3246 | 81.7378 | 85.8973 |
F | 30.1218 *** | 30.8414 *** | 43.1769 *** | 39.1093 *** | 29.5972 *** | 33.2710 *** | 33.5989 *** | ------ |
Variable | Industrial Structure | Sewage Treatment | Water Recycling | Technological Progress | Water Price Reform | ||
---|---|---|---|---|---|---|---|
The Proportion of the Primary Industry | The Proportion of the Secondary Industry | The Proportion of the Tertiary Industry | |||||
c | 4.8541 * (1.7765) | 3.8033 *** (2.9682) | 4.1168 ** (2.0827) | 5.1860 * (1.8034) | 3.3196 *** (4.9255) | 4.2345 ** (2.0783) | 5.5685 * (1.8134) |
Ws×Tm | −0.0983 *** (−3.2129) | 0.2349 (0.9657) | 0.0904 *** (3.6519) | 0.0716 *** (4.1627) | 0.0511 ** (2.0214) | 0.0674 *** (2.9519) | 0.0908 ** (2.0126) |
Ws×Tm2012 | −0.0874 (−1.1902) | 0.1721 (0.8118) | 0.0823 (0.8982) | 0.0459 (1.0810) | 0.0323 (0.9398) | 0.0470 (0.8695) | 0.0631 (0.7347) |
Ws×Tm2013 | −0.0926 (−1.2187) | 0.1973 (0.7151) | 0.0971 (0.8105) | 0.0502 (0.9783) | 0.0379 (1.2635) | 0.0491 (0.9596) | 0.0783 (0.7972) |
Control variable | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Individual fixed effect | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Time fixed effect | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
R2 | 82.0925 | 83.3260 | 82.6385 | 84.8956 | 83.1241 | 82.9394 | 81.2271 |
F | 31.0554 *** | 31.9438 *** | 31.7067 *** | 29.0413 *** | 31.4709 *** | 32.1822 *** | 31.8850 *** |
Variable | Water Pollution Intensity | ||||
---|---|---|---|---|---|
c | 5.1160 * (1.7687) | 3.7446 ** (2.1513) | 3.2684 *** (4.5652) | 4.0531 * (1.8104) | 4.1692 ** (1.9868) |
Ws×Tm | −0.1069 ** (−2.0405) | −0.0947 *** (−4.8390) | −0.0908 * (−1.7476) | −0.1076 *** (−3.4282) | −0.0973 ** (−2.1314) |
Is | −0.1736 ** (−1.9928) | ||||
St | −0.1985 * (−1.8049) | ||||
Wr | −0.1679 *** (−4.5345) | ||||
Tp | −0.2137 ** (−2.0684) | ||||
Pr | −0.1316 * (−1.7551) | ||||
Control variable | Yes | Yes | Yes | Yes | Yes |
Individual fixed effect | Yes | Yes | Yes | Yes | Yes |
Time fixed effect | Yes | Yes | Yes | Yes | Yes |
R2 | 84.1792 | 83.5848 | 85.7650 | 83.9753 | 83.7839 |
F | 32.2216 *** | 31.9834 *** | 29.2937 *** | 31.7465 *** | 32.4617 *** |
Variable | First Batch of Pilot Cities | Second Batch of Pilot Cities |
---|---|---|
c | 3.1673 * (1.7280) | 2.9842 ** (1.9737) |
Ws×Tm2014 | −0.1300 * (−1.6948) | ------ |
Ws×Tm2015 | −0.1627 ** (−2.1015) | −0.1384 * (−1.7029) |
Ws×Tm2016 | −0.2176 *** (−4.5439) | −0.1851 *** (−3.7656) |
Ws×Tm2017 | −0.1690 ** (−2.0682) | −0.2123 ** (−2.1140) |
Ws×Tm2018 | −0.1569 ** (−1.9834) | −0.1420 ** (−2.0318) |
Ws×Tm2019 | −0.1328 * (−1.7153) | −0.1215 * (−1.6994) |
Ws×Tm2020 | −0.1075 * (−1.7306) | −0.0921 * (−1.7023) |
Control variable | Yes | Yes |
Individual fixed effect | Yes | Yes |
Time fixed effect | Yes | Yes |
R2 | 76.2462 | 73.5349 |
F | 41.3535 *** | 39.2776 *** |
Variable | High Economic Development Level | Low Economic Development Level | Abundant Water Resource Endowment | Insufficient Water Resource Endowment | High Environmental Regulation Intensity | Low Environmental Regulation Intensity |
---|---|---|---|---|---|---|
c | 4.0468 ** (2.0659) | 4.2143 ** (1.9937) | 5.2001 * (1.6765) | 3.8815 *** (3.3386) | 5.0087 *** (3.3043) | 4.1569 ** (2.0654) |
Ws×Tm | −0.0715 *** (−3.2126) | −0.1786 ** (−2.0543) | −0.1494 *** (−4.1538) | −0.0931 ** (−2.1074) | −0.1002 ** (−1.9961) | −0.1438 *** (−4.2742) |
Control variable | Yes | Yes | Yes | Yes | Yes | Yes |
Individual fixed effect | Yes | Yes | Yes | Yes | Yes | Yes |
Time fixed effect | Yes | Yes | Yes | Yes | Yes | Yes |
R2 | 82.5242 | 81.3791 | 79.9189 | 77.8780 | 79.5128 | 80.7827 |
F | 42.7923 *** | 42.2014 *** | 41.4396 *** | 35.3293 *** | 43.2539 *** | 41.8875 *** |
Empirical p-value | 0.0427 ** | 0.0382 ** | 0.0619 * |
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Lyu, L.; Kan, D.; Yao, W.; Huang, W. Has China’s Pilot Policy of Water Ecological Civilization City Construction Reduced Water Pollution Intensity? Land 2022, 11, 1999. https://doi.org/10.3390/land11111999
Lyu L, Kan D, Yao W, Huang W. Has China’s Pilot Policy of Water Ecological Civilization City Construction Reduced Water Pollution Intensity? Land. 2022; 11(11):1999. https://doi.org/10.3390/land11111999
Chicago/Turabian StyleLyu, Lianju, Daxue Kan, Wenqing Yao, and Weichiao Huang. 2022. "Has China’s Pilot Policy of Water Ecological Civilization City Construction Reduced Water Pollution Intensity?" Land 11, no. 11: 1999. https://doi.org/10.3390/land11111999