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Open research questions in Energy, Environment, and Transportation Policies

54 unresolved questions extracted from the limitations and future-work sections of 791 Energy, Environment, and Transportation Policies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Changing industry behaviour is a challenge - The lack of awareness among adults and children regarding healthy choices is a concern - Confusing marketing and hidden sugars contribute to the problem

    700 days on: What has happened to Government pledge to ban energy drinks sales to children? · 2026 · DOI

  • Further analysis of the reconciled data can be conducted to investigate the alignment of emissions and cost incentives. The data reconciliation approach can be applied to other energy-related datasets. The uncertainty around the timing and duration of the IBDR event for a given participant can be studied.

    Retail Electricity Costs and Emissions Incentives Are Misaligned for Commercial and Industrial Power Consumers · 2026 · DOI

  • The cost and Scope 2 carbon emission implications of electrification are opaque for both power consumers and utilities. The variance in marginal emissions factors across grid regions and time-of-day obscures emissions reduction benefits of electrification.

    Retail Electricity Costs and Emissions Incentives Are Misaligned for Commercial and Industrial Power Consumers · 2026 · DOI

  • Further research is needed to examine the impact of policy factors on EV penetration. Future studies can investigate the effectiveness of different electrification strategies in different regions.

    Understanding the influencing factors of electric vehicle penetration in China: a city-level analysis · 2026 · DOI

  • The existing literature does not provide a fine-grained analysis of spatial heterogeneity in EV adoption. There is a lack of understanding of the key factors influencing EV penetration in China.

    Understanding the influencing factors of electric vehicle penetration in China: a city-level analysis · 2026 · DOI

  • However, the most effective pathway to achieve the WHO-recommended 75 percent tax share under different reform timelines remains unclear.

    Stochastic Scenario Modelling of Tobacco Taxation in Nepal: Evaluating 5–10 Year Pathways to Achieve a 75 Percent Tax Share · 2026 · DOI

  • Theoretical econometrics literature does not provide clear directives for choosing between pooling cross-section/time-series data and individual time-series models. Prior research has used diverse approaches, leading to inconsistent findings.

    Gasoline demand in the OECD · 1983 · DOI

  • The challenge of describing circumstances in a way that is relevant to policy goals. The challenge of identifying households most in need of public assistance.

    Case-wise policy analysis: Another look at the burden of high energy costs · 1983 · DOI

  • The paper identifies a gap in the use of variable-wise policy analysis. The paper discusses the need for a more accurate picture of household needs.

    Case-wise policy analysis: Another look at the burden of high energy costs · 1983 · DOI

  • The dynamic behavior of the population makes the choice of sampling design particularly important. The study needs to capture the temporal pattern in petrol prices.

    Petrol Price Estimation in Pakistan Under Predictive Approach: A Comparative Framework in Systematic and Simple Random Sampling · 2026 · DOI

  • There is a gap in using systematic sampling for petrol price estimation. Prior work has not addressed the use of systematic sampling for estimating the average petrol price in Pakistan.

    Petrol Price Estimation in Pakistan Under Predictive Approach: A Comparative Framework in Systematic and Simple Random Sampling · 2026 · DOI

  • Future research should focus on developing energy-efficient technologies and optimizing traffic management in the ICT sector. The study suggests that further analysis is needed to quantify the rebound effect in different contexts and to develop strategies to mitigate its impact.

    Digital Carbon Footprint and Rebound Effect of Fixed and Mobile Network Data Traffic · 2026 · DOI

  • The study identifies a research gap in the analysis of GHG emissions from internet usage, particularly in the context of South Korea. The authors highlight the need for a comprehensive approach to address both technological efficiency and consumption patterns in the ICT sector.

    Digital Carbon Footprint and Rebound Effect of Fixed and Mobile Network Data Traffic · 2026 · DOI

  • The study identifies a gap in the literature on the effect of clean fuel technology for cooking and access to electricity on CO₂ emissions. The study aims to fill this gap by providing empirical evidence on the importance of clean fuel technology.

    Effect of clean energy on CO₂ emissions in G-20 countries using STIRPAT approach · 2026 · DOI

  • The paper identifies a gap in the understanding of the responses of firms to energy price shocks. It notes that the analysis of the correlation between the substitution of machinery and equipment and the decrease of electricity consumption and oil use is limited.

    Energy Price Shocks and Short-Term Reactions of Firms: The Case of the German Energy Crisis in 2022 · 2026 · DOI

  • The study has inherent uncertainty in atmospheric processes and long-term policy projections. A limited sensitivity analysis was conducted to evaluate the robustness of the model results.

    Dynamic System Modeling of PM₂.₅ Emissions and Concentrations in DKI Jakarta Based on BAU, Moderate, and Aggressive Scenarios · 2026 · DOI

  • The long-term effectiveness of different intervention levels on PM₂.₅ concentrations has not been sufficiently evaluated using an integrated and dynamic approach. There is a need for a system dynamics model to project PM₂.₅ emissions and concentration trends in DKI Jakarta under different scenarios.

    Dynamic System Modeling of PM₂.₅ Emissions and Concentrations in DKI Jakarta Based on BAU, Moderate, and Aggressive Scenarios · 2026 · DOI

  • The literature emphasizes that carbon emissions exhibit a nonlinear relationship with economic growth and respond asymmetrically to periods of expansion and contraction. There is a need to examine the cyclical components of carbon emissions and GDP in the Turkish economy.

    THE CYCLICAL DYNAMICS OF CARBON EMISSIONS: A MARKOV-SWITCHING APPROACH FOR TURKIYE · 2026 · DOI

  • There is relatively little research that examines sectoral patterns of fossil energy consumption and their relationship with economic growth in Croatia. The existing literature is rich in analyses at the European Union level, but there is a lack of studies focusing on Croatia.

    Sectoral Shift-Share Analysis of Fossil Energy Consumption and Economic Growth in Croatia · 2026 · DOI

  • The European effect (N) remains weak in the post-accession period, suggesting that EU membership alone was insufficient to substantially alter domestic fossil fuel consumption patterns.

    Sectoral Shift-Share Analysis of Fossil Energy Consumption and Economic Growth in Croatia · 2026 · DOI

  • The study identifies a research gap in understanding the relationship between energy transition and economic growth in the context of the EU. The main research problem is to determine how the EU's energy transition is progressing and whether it should be considered in the context of the determinants of economic growth.

    Energy Transition in the Context of the Determinants of Long-Term Economic Growth in the European Union · 2026 · DOI

  • There is a need for effective methods to monitor and improve energy efficiency in the service sector. The service sector has been underresearched in terms of energy efficiency analysis.

    Decarbonization of EU Services Sector: Shadow Carbon Prices Approach in Energy Efficiency Analysis · 2026 · DOI

  • The originality of this paper lies in its focused application of the SCP concept to the underresearched tertiary sector, proposing it as a vital tool for evaluating policy effectiveness and guiding the EU's transition to a low-carbon service economy by providing a more nuanced understanding of the economic trade-offs involved in reducing environmental impact of energy consumption in the service sector.

    Decarbonization of EU Services Sector: Shadow Carbon Prices Approach in Energy Efficiency Analysis · 2026 · DOI

  • The gap in the literature is the lack of research on the impact of carbon taxation on GDP and economic growth. The study identifies a need for further research on the relationship between carbon taxation and economic growth.

    Impact of carbon revenue on EU gross domestic product · 2026 · DOI

  • The research problem and the gap in the literature arise because existing scientific work typically examines carbon dioxide pricing only as a means of reducing emissions or analyses the use of revenues for social or environmental programmes, but does not examine its influence on GDP, investment, or economic growth.

    Impact of carbon revenue on EU gross domestic product · 2026 · DOI

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54 open questions have been extracted from the limitations and future-work passages of 791 Energy, Environment, and Transportation Policies papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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