| 1. |
- Azar, Christian, 1969, et al.
(författare)
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The social cost of methane
- 2023
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Ingår i: Climatic Change. - 1573-1480 .- 0165-0009. ; 176:6
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Tidskriftsartikel (refereegranskat)abstract
- A rapid and sustained reduction of methane emissions has been proposed recently as a key strategy to meet the climate targets of the Paris Agreement. The social cost of methane (SCM), which expresses the climate damage cost associated with an additional metric ton of methane emitted, is a metric that can be used to design policies to reduce the emissions of this gas. Here, we extend the DICE-2016R2 model so that it includes an improved carbon cycle and energy balance model as well as methane emissions, methane abatement cost, and an atmospheric methane cycle explicitly to be able to provide consistent estimations of the SCM. We estimate the SCM to lie in the range 880–8100 USD/tCH4 in 2020, with a base case estimate of 4000 USD/tCH4. We find our base case estimate to be larger than the average SCM presented in other studies mainly due to the revised damage function we use. We also estimate the social cost of carbon (SCC) and find that SCM estimates are less sensitive to variations in the social discount rate than the SCC due to the relatively short lifetime of methane. Changes in the parameterization of the damage function have similar relative impacts on both SCM and SCC. Furthermore, we evaluate the ratio of SCM to SCC as an alternative metric to GWP-100 of CH4 to facilitate tradeoffs between these two gases. We find this ratio to lie in the range 7–33 in 2020, with a base case estimate of 21, based on an extensive sensitivity analysis with respect to the discount rate, damage cost, and underlying emission scenarios. We also show that the global warming potential (GWP) and the SCM to SCC ratio are almost the same if the inverse of the effective discounting (in the social cost calculations) is equal to the time horizon used to evaluate the GWP. For comparison, the most widely used GWP, i.e., with a time horizon of 100 years, equals 27, hence in the upper range of the ratio we find using the SCM to SCC ratio.
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| 2. |
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| 3. |
- Cardell, Lars Olaf, et al.
(författare)
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Modelling the impact of sublingual immunotherapy versus subcutaneous immunotherapy on patient travel time and CO2 emissions in Sweden
- 2024
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Ingår i: Scientific Reports. - 2045-2322. ; 14:1
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Tidskriftsartikel (refereegranskat)abstract
- In Sweden, allergy immunotherapy (AIT) is available as either subcutaneous immunotherapy (SCIT) injections or sublingual immunotherapy (SLIT) tablets and is used to treat moderate-severe allergic rhinitis (AR). This study sought to determine treatment-related CO2 emissions and travel times in Swedish patients receiving either SCIT or SLIT-tablets. A list of specialized Swedish AR clinics that administer AIT was determined, and respective co-ordinates retrieved. Swedish municipality population data were obtained from a national database. The mean distance from each Swedish municipality to the nearest AR clinic was calculated, adjusted using a detour index, and weighted by estimated patient population size. Transport modality data were obtained from a Swedish urban transport study and CO2 emissions were obtained from Government sources. The mean number of annual SLIT-tablets and SCIT doses required were calculated based on product labels and clinical expert input. The annual number of healthcare professional interactions were layered into the model to estimate changes in mean patient travel time, distance, and travel-related CO2 emissions associated with using SCIT versus SLIT-tablets. Mean annual travel-related CO2 emissions were 410 tonnes (to two significant figures [s.f.]; standard deviation [SD] 90) with SLIT-tablets, versus 1700 tonnes (SD 380) for SCIT, resulting in mean annual savings of approximately 1300 tonnes (SD 290) of CO2 if all AIT patients were to receive SLIT-tablets instead of SCIT, over 380 times greater than 2021 average Swedish CO2 emissions per capita. Approximate mean annual travel times for patients taking SLIT-tablets were 66,500 h (three s.f.; SD 14,400), and 278,000 h (SD 60,200) for SCIT, resulting in mean annual savings of 211,000 h (SD 45,800) if all AIT patients were to receive SLIT-tablets instead of SCIT. Compared with SCIT injections, SLIT-tablets led to substantial reductions in treatment-related CO2 emissions and travel times for Swedish patients.
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| 4. |
- Carlsson, Fredrik, 1968, et al.
(författare)
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Red, yellow, or green? Do consumers’ choices of food products depend on the label design?
- 2022
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Ingår i: European Review of Agricultural Economics. - : Oxford University Press (OUP). - 0165-1587 .- 1464-3618. ; 49:5
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Tidskriftsartikel (refereegranskat)abstract
- Using a stated preference survey, we investigate to what extent consumers are willing to make costlier food consumption choices to decrease damages to health, the environment, and animal well-being. In particular, we investigate how the graphic design of the labels affects choice behaviour by comparing traffic–light and greyscale labels and plain-text description with each other. We found that the red colour in traffic lights seems to strengthen respondents’ preferences for avoiding the worst level of a collective attribute such as climate impact or antibiotics use, while the green colour strengthened preferences for the more private attribute, namely healthiness. On average, the price premiums for a green label compared with a red label is 52 per cent for healthiness, 64 per cent for both animal welfare and antibiotics, and 20 per cent for climate impact.
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| 5. |
- Carlsson, Fredrik, 1968, et al.
(författare)
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The climate decade: Changing attitudes on three continents
- 2021
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Ingår i: Journal of Environmental Economics and Management. - : Elsevier BV. - 0095-0696 .- 1096-0449. ; 107
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Tidskriftsartikel (refereegranskat)abstract
- Using identical surveys a decade apart, we examine how attitudes and willingness to pay (WTP) for climate policies have changed in the United States, China, and Sweden. All three countries exhibit an increased willingness to pay for climate mitigation. Ten years ago, Sweden had a larger fraction of believers in anthropogenic climate change and a higher WTP for mitigation, but today the national averages are more similar. Although we find convergence in public support for climate policy across countries, there is considerable divergence in both WTP and climate attitudes within countries. Political polarization explains part of this divergence.
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| 6. |
- Carson, Richard T., et al.
(författare)
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Perceptions of the seriousness of major public health problems during the COVID-19 pandemic in seven middle-income countries
- 2023
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Ingår i: Communications Medicine. - : Springer Nature. - 2730-664X. ; 3
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Tidskriftsartikel (refereegranskat)abstract
- IntroductionPublic perception of the seriousness of the COVID-19 pandemic compared to six other major public health problems (alcoholism and drug use, HIV/AIDS, malaria, tuberculosis, lung cancer and respiratory diseases caused by air pollution and smoking, and water-borne diseases like diarrhea) is unclear. We designed a survey to examine this issue using YouGov’s internet panels in seven middle-income countries in Africa, Asia, and Latin America in early 2022.MethodsRespondents rank ordered the seriousness of the seven health problems using a repeated best-worst question format. Rank-ordered logit models allow comparisons within and across countries and assessment of covariates.ResultsIn six of the seven countries, respondents perceived other respiratory illnesses to be a more serious problem than COVID-19. Only in Vietnam was COVID-19 ranked above other respiratory illnesses. Alcoholism and drug use was ranked the second most serious problem in the African countries. HIV/AIDS ranked relatively high in all countries. Covariates, particularly a COVID-19 knowledge scale, explained differences within countries; statistics about the pandemic were highly correlated with differences in COVID-19’s perceived seriousness.ConclusionsPeople in the seven middle-income countries perceived COVID-19 to be serious (on par with HIV/AIDS) but not as serious as other respiratory illnesses. In the African countries, respondents perceived alcoholism and drug use as more serious than COVID-19. Our survey-based approach can be used to quickly understand how the threat of a newly emergent disease, like COVID-19, fits into the larger context of public perceptions of the seriousness of health problems.
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| 7. |
- Coria, Jessica, 1979, et al.
(författare)
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Interjurisdictional externalities, overlapping policies and NOx pollution control in Sweden
- 2021
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Ingår i: Journal of Environmental Economics and Management. - : Elsevier BV. - 0095-0696 .- 1096-0449. ; 107
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we analyze the effects of the interaction between national and local policies designed to reduce an environmental externality that causes environmental damages both nationally and locally.We formulate a theoretical model to develop hypotheses regarding the combined effects of such policies on the stringency of the local policies and on firms’ emissions reductions. To test our hypotheses, we use actual data for Sweden, where emissions of nitrogen oxides from combustion boilers are subject to a heavy national tax and most are also subject to individual emissions standards set by county authorities. Our analytical findings suggest that the national tax has brought along stricter emission standards. This is confirmed in our data, where emission standards are significantly more stringent when combined with the national tax.
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| 8. |
- Damania, Richard, et al.
(författare)
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Environmental policy instruments and corruption
- 2020
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Ingår i: China Economic Journal. - : Informa UK Limited. - 1753-8963 .- 1753-8971. ; 13:2
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Tidskriftsartikel (refereegranskat)abstract
- In this paper we discuss the choice of taxation or regulation of environmental externalities. The subject might appear to be a well-trodden path, but we believe we have a new angle on this well-established question. We think we are being quite realistic when we assume that corrupt practices lurk behind every corner, threatening to derail the good intents of any regulator. With this starting point we compare the result of trying to impose taxation contra regulation in environments where the implementation in both cases will be marred by corrupt practices of under-reporting emissions and bribing inspectors. In a simple and stylized model of these circumstances we show that taxes tend to perform the same or better in the sense that a pollution tax induces greater compliance and lower pollution than does a regulatory standard. We also show that the advantages of a tax are particularly great in countries where the enforcement ability of authorities is weak, which is commonly thought to be the case in developing countries.
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| 9. |
- Duan, Hongbo, et al.
(författare)
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China’s adaptive response to climate change through air-conditioning
- 2023
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Ingår i: iScience. - : Elsevier BV. - 2589-0042. ; 26:3, s. 1-19
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Tidskriftsartikel (refereegranskat)abstract
- Studies have shown that the soaring demand for air conditioners in recent years is closely related to the worsening global warming; however, little evidence has been provided for China. This study uses weekly data of 343 Chinese cities to investigate how air conditioner sales respond to climate variability. We detected a U-shaped relationship between air-conditioning and temperature. An additional day with average temperature above 30°C increases weekly sales by 16.2%. Heterogeneity analysis shows that the adoption of air-conditioning is different for south and north China. By combining our estimates with shared socioeconomic pathway scenarios, we project China’s mid-century air conditioner sales and the resulting electricity demand. Under the fossil-fueled development scenario, air conditioner sales in the Pearl River Delta would rise by 71% (65.7%–87.6%) in summer. On average, the per capita electricity demand for air-conditioning will surge by 28% (23.2%–35.4%) in China by mid-century.
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| 10. |
- Ewald, Jens, et al.
(författare)
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Saving energy in residential buildings: the role of energy pricing
- 2021
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Ingår i: Climatic Change. - : Springer Science and Business Media LLC. - 0165-0009 .- 1573-1480. ; 167
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Tidskriftsartikel (refereegranskat)abstract
- A zero-carbon society requires dramatic change everywhere including in buildings, a large and politically sensitive sector. Technical possibilities exist but implementation is slow. Policies include many hard-to-evaluate regulations and may suffer from rebound mechanisms. We use dynamic econometric analysis of European macro data for the period 1990–2018 to systematically examine the importance of changes in energy prices and income on residential energy demand. We find a long-run price elasticity of −0.5. The total long-run income elasticity is around 0.9, but if we control for the increase in income that goes towards larger homes and other factors, the income elasticity is 0.2. These findings have practical implications for climate policy and the EU buildings and energy policy framework.
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