Descriptive statistics
| S&P 500 firms | FTSE 350 firms | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Mean | Median | Max | Min | Skew | Kurtosis | Mean | Median | Max | Min | Skew | Kurtosis | |
| Dependent variable | |||||||||||||
| Environmental disclosure | 59.079 | 62.275 | 95.190 | 6.770 | −0.436 | 2.360 | 54.017 | 54.600 | 90.770 | 10.320 | −0.174 | 2.314 | |
| Independent variables | |||||||||||||
| Board size | 11.133 | 11.000 | 22.000 | 1.000 | −0.008 | 4.368 | 9.059 | 9.000 | 17.000 | 1.000 | 0.501 | 3.233 | |
| Board independence | 0.866 | 0.888 | 1.000 | 0.500 | −1.226 | 4.666 | 0.709 | 0.714 | 1.000 | 0.266 | 0.312 | 3.269 | |
| Role duality | 0.746 | 1.000 | 1.000 | 0.000 | −1.132 | 2.282 | 0.068 | 0.000 | 1.000 | 0.000 | 3.412 | 12.645 | |
| Board meeting | 8.049 | 7.000 | 37.000 | 1.000 | 2.117 | 11.327 | 8.276 | 8.000 | 28.000 | 2.000 | 1.967 | 10.702 | |
| Board gender diversity | 0.644 | 0.672 | 0.997 | 0.053 | −0.644 | 2.647 | 0.559 | 0.567 | 0.998 | 0.037 | −0.132 | 1.806 | |
| Audit committee size | 4.270 | 4.000 | 7.000 | 1.000 | −0.012 | 2.105 | 3.940 | 3.000 | 8.000 | 2.000 | 6.967 | 126.371 | |
| Audit committee independence | 0.994 | 1.000 | 1.000 | 0.333 | −9.416 | 138.343 | 0.963 | 1.000 | 1.000 | 0.142 | −3.348 | 16.210 | |
| Control variables | |||||||||||||
| Firm profitability | 0.068 | 0.058 | 0.457 | −0.347 | 0.496 | 7.343 | 0.064 | 0.060 | 0.290 | −0.270 | 0.214 | 7.911 | |
| Firm age | 44.190 | 33.000 | 139.000 | 6.000 | 1.237 | 3.720 | 49.800 | 38.500 | 132.000 | 5.000 | 0.833 | 2.808 | |
| Firm size | 10.303 | 10.310 | 12.530 | 1.800 | −5.217 | 50.776 | 9.703 | 9.600 | 12.170 | 8.360 | 1.001 | 3.887 | |
| Board specific skills | 0.474 | 0.460 | 0.990 | 0.150 | 0.107 | 1.832 | 0.509 | 0.510 | 0.993 | 0.110 | 0.011 | 1.808 | |
| S&P 500 firms | FTSE 350 firms | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Mean | Median | Max | Min | Skew | Kurtosis | Mean | Median | Max | Min | Skew | Kurtosis | |
| Environmental disclosure | 59.079 | 62.275 | 95.190 | 6.770 | −0.436 | 2.360 | 54.017 | 54.600 | 90.770 | 10.320 | −0.174 | 2.314 | |
| Board size | 11.133 | 11.000 | 22.000 | 1.000 | −0.008 | 4.368 | 9.059 | 9.000 | 17.000 | 1.000 | 0.501 | 3.233 | |
| Board independence | 0.866 | 0.888 | 1.000 | 0.500 | −1.226 | 4.666 | 0.709 | 0.714 | 1.000 | 0.266 | 0.312 | 3.269 | |
| Role duality | 0.746 | 1.000 | 1.000 | 0.000 | −1.132 | 2.282 | 0.068 | 0.000 | 1.000 | 0.000 | 3.412 | 12.645 | |
| Board meeting | 8.049 | 7.000 | 37.000 | 1.000 | 2.117 | 11.327 | 8.276 | 8.000 | 28.000 | 2.000 | 1.967 | 10.702 | |
| Board gender diversity | 0.644 | 0.672 | 0.997 | 0.053 | −0.644 | 2.647 | 0.559 | 0.567 | 0.998 | 0.037 | −0.132 | 1.806 | |
| Audit committee size | 4.270 | 4.000 | 7.000 | 1.000 | −0.012 | 2.105 | 3.940 | 3.000 | 8.000 | 2.000 | 6.967 | 126.371 | |
| Audit committee independence | 0.994 | 1.000 | 1.000 | 0.333 | −9.416 | 138.343 | 0.963 | 1.000 | 1.000 | 0.142 | −3.348 | 16.210 | |
| Firm profitability | 0.068 | 0.058 | 0.457 | −0.347 | 0.496 | 7.343 | 0.064 | 0.060 | 0.290 | −0.270 | 0.214 | 7.911 | |
| Firm age | 44.190 | 33.000 | 139.000 | 6.000 | 1.237 | 3.720 | 49.800 | 38.500 | 132.000 | 5.000 | 0.833 | 2.808 | |
| Firm size | 10.303 | 10.310 | 12.530 | 1.800 | −5.217 | 50.776 | 9.703 | 9.600 | 12.170 | 8.360 | 1.001 | 3.887 | |
| Board specific skills | 0.474 | 0.460 | 0.990 | 0.150 | 0.107 | 1.832 | 0.509 | 0.510 | 0.993 | 0.110 | 0.011 | 1.808 | |
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