Table 1 Resilience indicator evaluation equations.

From: Understanding carbon resilience under public health emergencies: a synthetic difference-in-differences approach

Indicator

Definition

Starting time (\({N}_{i}\))

Ending time (\({N}_{j}\))

Equation

In-resilience

Resilience from the onset of PHEs until their conclusion

\({N}_{0}-{N}_{1}\)

\({N}_{0}+{N}_{2}\)

\(1/{\int }_{{N}_{0}-{N}_{1}}^{{N}_{0}+{N}_{2}}A\)

Post-resilience

Resilience after PHEs ended

\({N}_{0}+{N}_{2}\)

\({N}_{2}+{N}_{3}\)

\(1/{\int }_{{N}_{0}+{N}_{2}}^{{N}_{2}+{N}_{3}}A\)

Throughout-resilience

Resilience covering the entire studied period

\({N}_{0}-{N}_{1}\)

\({N}_{2}+{N}_{3}\)

\(1/{\int }_{{N}_{0}-{N}_{1}}^{{N}_{2}+{N}_{3}}A\)

Redundancy

The reciprocal of the absolute maximum discrepancy between the actual and counterfactual emissions in the entire studied period

\({N}_{0}-{N}_{1}\)

\({N}_{2}+{N}_{3}\)

\(1/\text{max}\left|{Y\left(0\right)}_{post, tr}- {Y\left(1\right)}_{post, tr}\right|\)