Table 1 Basic information of CEPI.

From: Does vertical supervision enhance labor productivity? Evidence from China’s central environmental protection inspection

The round of CEPI

Duration

Inspected provinces

Pilot

2016.01.01–2016.01.31

Hebei

1st batch

2016.07.12–2016.08.19

Inner Mongolia, Heilongjiang, Jiangsu, Jiangxi, Henan, Ningxia, Yunnan, and Guangxi.

2nd batch

2016.11.24–2016.12.30

Beijing, Shanghai, Hubei, Guangdong, Chongqing, Shanxi, and Gansu.

3rd batch

2017.04.24–2017.05.28

Tianjin, Shanxi, Anhui, Liaoning, Fujian, Hunan, and Guizhou.

4th batch

2017.08.07–2017.09.15

Jilin, Zhejiang, Shandong, Hainan, Sichuan, Qinghai, Xinjiang, and Tibet.

Look-back

2018.05.30–2018.06.07

Hebei, Henan, Inner Mongolia, Ningxia, Heilongjiang, Jiangsu, Jiangxi, Guangdong, Guangxi, Yunnan, Shanxi, Liaoning, Jilin, Anhui, Shandong, Hubei, Hunan, Sichuan, Guizhou, and Shaanxi.

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