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. 2021 Dec 20;118(52):e2109912118. doi: 10.1073/pnas.2109912118

Table 3.

Heterogeneous effects by allowance allocation rules

  Total emissions Emission intensity
 Dependent variable (1) (2) (3) (4)
 Announcement –0.083** –0.120* –0.047 –0.068
  (0.039) (0.063) (0.033) (0.073)
 Trading –0.342*** –0.399** –0.367*** –0.436***
  (0.098) (0.147) (0.076) (0.096)
 Trading × rate 0.212*** 0.284* 0.319*** 0.414***
  (0.067) (0.140) (0.079) (0.086)
 Observations 2,416 2,416 2,416 2,416
 R-squared 0.055 0.207 0.102 0.233
 Firm FE, year FE Y Y Y Y
 Province trend N Y N Y
 Industry trend N Y N Y

All dependent variables are in natural logarithms. Announcement equals one for the regulated firms during the announcement period (2011 to 2012). Trading equals one for the regulated firms during the trading period (2013 to 2015). Rate equals one if the regulated firms are categorized into the rate-based group. SEs in parentheses are clustered at the industry level. ***, significant at the 1% level; **, significant at the 5% level; *, significant at the 10% level.