Table 6 Robustness tests: propensity score matching and entropy balancing analysis.

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

Variables

(1)

(2)

PSM

Entropy balancing

LP

LP

CEPI

0.034** (2.57)

0.026** (2.53)

Constant

16.877*** (68.37)

16.752*** (86.07)

Controls

Yes

Yes

Year FE

Yes

Yes

Firm FE

Yes

Yes

Observations

11,454

20,848

Adj R2

0.541

0.422

  1. T values are reported in parentheses.
  2. Coefficients marked with **, and *** are significant at 5%, and 1%, respectively.
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