Does the SO2 emissions trading scheme encourage green total factor productivity? An empirical assessment on China’s cities
2020
Hou, Bingqing | Wang, Bing | Du, Minzhe | Zhang, Ning
As a market-based environmental regulation tool, emissions trading scheme for SO₂ (SO₂ ETS) has been carried out in China for decades, so impacts of SO₂ ETS have become a vital issue to the society. Based on the SO₂ ETS of China in 2007, this paper attempts to test and verify impacts of the scheme on environment and economy, especially on green total factor productivity (TFP). We firstly combine biennial weight-modified non-radial direction distance function and Luenberger productivity indicator to measure and decompose the green TFP of 280 cities in China over the period 2003 to 2016, and apply a difference-in-differences method (DID) with fixed effect models to investigate whether SO₂ ETS achieves a win–win scenario of “emission reducing” and “efficiency increasing.” The results show that the scheme significantly may decrease SO₂ emissions and SO₂ intensity by 12.3% and 11.0%, respectively, in ETS regions while no obvious impact on GDP. In terms of green TFP, we find SO₂ ETS inhibits the growth of green TFP, and the negative impact mainly caused by the deterioration in efficiency change. Therefore, we hold that SO₂ ETS is effective for improving environment, but it is still difficult to achieve the promotion of green TFP simultaneously.
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