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. 2023 Jul 24;18(7):e0288789. doi: 10.1371/journal.pone.0288789

Table 11. Placebo test.

VARIABLES (1) (2) (3)
ESG ESG ESG
L2PT -0.0178
(-0.977)
L2Mayor -0.0232
(-1.340)
L2Psecretary -0.0226
(-1.306)
Size 0.2918*** 0.2919*** 0.2919***
(3.493) (3.498) (3.498)
Lev -0.5011*** -0.5015*** -0.5012***
(-7.604) (-7.608) (-7.606)
ROA 0.4266*** 0.4257*** 0.4274***
(3.067) (3.060) (3.074)
Growth -0.0947*** -0.0947*** -0.0946***
(-6.972) (-6.967) (-6.961)
Indep 0.0077 0.0062 0.0091
(0.038) (0.031) (0.045)
TobinQ -0.0049 -0.0049 -0.0049
(-0.693) (-0.691) (-0.694)
Duality 0.0307 0.0306 0.0307
(1.614) (1.610) (1.614)
Top10 0.3672*** 0.3674*** 0.3673***
(6.526) (6.529) (6.527)
Age 0.0953* 0.0955* 0.0954*
(1.704) (1.707) (1.705)
Per capita GDP 0.0061* 0.0061* 0.0062*
(1.760) (1.743) (1.774)
Constant -1.2001* -1.2016* -1.2039*
(-1.933) (-1.936) (-1.939)
Year & Firm Yes Yes Yes
Observations 23,391 23,391 23,391
R2 0.230 0.230 0.230
Adj-R2 0.226 0.226 0.226

Note. This table reports the results of the placebo test from OLS regression. The dependent variable is ESG, and the independent variables in column (1), column (2) and column (3) are L2PT, L2Mayor, and L2Psecretary respectively. Firm-fixed effects and year-fixed effects are also included. The t values reported in parentheses are adjusted based on robust standard errors clustered by firm, where *, **, and *** denote significance levels of 0.01, 0.05, and 0.10 respectively. All variables are defined in Appendix A in S1 Table.