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Table 1.

Green innovation index system of heavy pollution industry.

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Table 2.

Descriptive statistics of variables.

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Table 2 Expand

Fig 1.

System framework of this paper.

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Table 3.

Green innovation efficiency of China’s heavy-pollution industries in 2009–2018.

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Table 3 Expand

Fig 2.

Clustering results of 16 heavy polluting industries under k-means.

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Fig 2 Expand

Table 4.

Clustering division of 16 heavy polluting industries.

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Table 4 Expand

Fig 3.

Components variation of the coefficient vector within the industry scope.

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Fig 3 Expand

Table 5.

CP value changes corresponding to Lasso.

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Table 5 Expand

Table 6.

Lasso regression coefficient of industries in different cluster.

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Table 6 Expand

Table 7.

Panel Tobit regression results in 16 heavily polluted industries.

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Table 7 Expand