Table 12 Threshold estimation.

From: Does larger scale enhance carbon efficiency? Assessing the impact of corporate size on manufacturing carbon emission efficiency

Threshold variable

Threshold type

Threshold values

95% confidence interval

Lower

Upper

lnER

First threshold (γ1)

−1.1811

−1.2222

−1.1778

lnRD

First threshold (γ1)

0.7827

0.7435

0.7871

lnOPEN

First threshold (γ1)

0.1075

0.1054

0.1112

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