Journal article Open Access
Persistent inequality in economically optimal climate policies
Gazzotti, Paolo;
Emmerling, Johannes;
Marangoni, Giacomo;
Castelletti, Andrea;
van der Wijst, Kaj-Ivar;
Hof, Andries;
Tavoni, Massimo
Benefit-cost analyses of climate policies by integrated assessment models have generated conflicting assessments. Two critical issues affecting social welfare are regional heterogeneity and inequality. These have only partly been accounted for in existing frameworks. Here, we present a benefit-cost model with more than 50 regions, calibrated upon emissions and mitigation cost data from detailed-process IAMs, and featuring country-level economic damages. We compare countries’ self-interested and cooperative behaviour under a range of assumptions about socioeconomic development, climate impacts, and preferences over time and inequality. Results indicate that without international cooperation, global temperature rises, though less than in commonly-used reference scenarios. Cooperation stabilizes temperature within the Paris goals (1.80∘C [1.53∘C–2.31∘C] in 2100). Nevertheless, economic inequality persists: the ratio between top and bottom income deciles is 117% higher than without climate change impacts, even for economically optimal pathways.
| Name | Size | |
|---|---|---|
|
s41467-021-23613-y.pdf
md5:b52de6d5c04f1dbe7f59f29be83ce96b |
1.2 MB | Download |
| All versions | This version | |
|---|---|---|
| Views | 60 | 60 |
| Downloads | 44 | 44 |
| Data volume | 51.6 MB | 51.6 MB |
| Unique views | 54 | 54 |
| Unique downloads | 42 | 42 |
- Publication date:
- June 8, 2021
- DOI:
-
- Published in:
- Nature Communications:.
- Grants:
-
European Commission:
-
NAVIGATE - Next generation of AdVanced InteGrated Assessment modelling to support climaTE policy making (821124)
- COACCH - CO-designing the Assessment of Climate CHange costs (776479)
-
NAVIGATE - Next generation of AdVanced InteGrated Assessment modelling to support climaTE policy making (821124)
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International