Risk AnalysisPub Date : 2025-07-10DOI: 10.1111/risa.70078
John Fry
{"title":"Projecting stock market impacts of climate change via rational bubble models.","authors":"John Fry","doi":"10.1111/risa.70078","DOIUrl":"https://doi.org/10.1111/risa.70078","url":null,"abstract":"<p><p>In this paper, we develop a rational bubble model to quantify the susceptibility of global stock markets to future temperature rises. The approach builds on existing theory incorporating the unpredictable timing of future Black-Swan events alongside price risks that increase in line with global temperature. An alternative specification where climate-change risks are instead linked to atmospheric carbon dioxide levels is also given. The approach offers simplicity, transparency and allows national-level effects to be estimated. In the short term, prices are artificially inflated and volatility artificially deflated as temperatures rise. This is in-line with previous work suggesting carbon-related risks are underpriced by markets. We use our model to estimate stock market exposure to future climate-change risks given future global temperature rises and increases in atmospheric <math> <semantics><mrow><mi>C</mi> <msub><mi>O</mi> <mn>2</mn></msub> </mrow> <annotation>$CO_2$</annotation></semantics> </math> . The potential effects are considerable once global temperatures increases beyond <math> <semantics> <mrow><msup><mn>2</mn> <mo>∘</mo></msup> <mi>C</mi></mrow> <annotation>$2^circ {rm C}$</annotation></semantics> </math> above preindustrial levels. We find that climate-change risks are priced in by certain G7 stock markets but not in smaller markets. Estimates of stock market losses directly attributable to global temperature rises up to <math> <semantics> <mrow><msup><mn>2</mn> <mo>∘</mo></msup> <mi>C</mi></mrow> <annotation>$2^circ {rm C}$</annotation></semantics> </math> above preindustrial levels are also given.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144609251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-07-09DOI: 10.1111/risa.70074
Haiying Wang, Ying Yuan, Tianyang Wang
{"title":"Natural disaster, ESG investing, and financial contagion.","authors":"Haiying Wang, Ying Yuan, Tianyang Wang","doi":"10.1111/risa.70074","DOIUrl":"https://doi.org/10.1111/risa.70074","url":null,"abstract":"<p><p>This study investigates financial contagion during natural disasters and explores the potential advantage of environmental, social, and governance (ESG) investing in such contagion. Specifically, we propose a new edge-weighted undirected contagion network to explore disaster-driven contagion and transmission channels across sectors, asset classes, and ESG international indexes. Our empirical results demonstrate the existence of the disaster-driven contagion. Natural disasters may increase investors' risk aversion, which further magnify portfolio rebalancing behavior, leading to the spread of financial contagion. Moreover, we also find that ESG investing helps mitigate the spread of disaster-driven contagion, thereby contributing to the resilience of the financial system during natural disasters.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144601388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-07-07DOI: 10.1111/risa.70062
Kash Barker, Elena Bessarabova, Sridhar Radhakrishnan, Andrés D González, Matthew S Weber, Jose E Ramirez Marquez, Yevgeniy Vorobeychik, John N Jiang
{"title":"Risk analysis of disinformation weaponized against critical networks.","authors":"Kash Barker, Elena Bessarabova, Sridhar Radhakrishnan, Andrés D González, Matthew S Weber, Jose E Ramirez Marquez, Yevgeniy Vorobeychik, John N Jiang","doi":"10.1111/risa.70062","DOIUrl":"https://doi.org/10.1111/risa.70062","url":null,"abstract":"<p><p>The vulnerability of critical networks to disinformation creates significant risks of disruption with potentially severe societal consequences. Maintaining secure and resilient networks, including infrastructure and supply chain networks, is important for ensuring economic productivity along with securing the health and well-being of society. An over-the-horizon threat to critical networks deals with adversaries who attack such networks indirectly by altering the consumption behavior of unwitting users influenced by weaponized disinformation. The proliferation of disinformation through various online platforms could pose a significant and evolving challenge able to compromise the resilience of critical networks. In this perspectives article, we review the literature in this area and offer some future research directions aimed at protecting networks from weaponized disinformation, enhancing their robustness, resilience, and adaptability.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144584717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-07-07DOI: 10.1111/risa.70054
Adam Lerner, Gediminas Mainelis, William Hallman, Howard Kipen, Monica Magalhaes, Brian Buckley, José Guillermo Cedeño Laurent, Nir Eyal
{"title":"Managing infectious aerosols to counter engineered pandemics: Current recommendations and future research.","authors":"Adam Lerner, Gediminas Mainelis, William Hallman, Howard Kipen, Monica Magalhaes, Brian Buckley, José Guillermo Cedeño Laurent, Nir Eyal","doi":"10.1111/risa.70054","DOIUrl":"https://doi.org/10.1111/risa.70054","url":null,"abstract":"<p><p>In the increasingly likely event of an engineered-virus outbreak or pandemic of catastrophic potential, managing infectious aerosols to reduce transmission will be crucial. Now is the time to start preparing our buildings, public opinion, and regulatory environments for the infectious aerosol management interventions necessary to protect the public. But which interventions should governments and institutions invest in the most? We review the leading candidate methods for infectious aerosol management and discuss their respective advantages, disadvantages, and suitable settings. There is strong emerging evidence that two recently explored technologies, direct exposure to far-ultraviolet-C (UVC) light and triethylene glycol, are particularly efficacious and safe, but there remain open questions about the long-term safety and efficacy of these interventions. In the meantime, we recommend other interventions-especially upper-room UVC and in-room air cleaners-for settings where most occupants regularly spend more than a small fraction of their day. We conclude by listing research questions about these interventions that still need to be researched in social science, product development, medicine, engineering, economics, and ethics.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144584715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Model averaging with logistic autoregressive conditional peak over threshold models for regional smog.","authors":"Chunli Huang, Xu Zhao, Fengying Zhang, Haiqing Chen, Ruoqi Song, Guangwen Ma, Weihu Cheng","doi":"10.1111/risa.70069","DOIUrl":"https://doi.org/10.1111/risa.70069","url":null,"abstract":"<p><p>We propose a novel dynamic generalized Pareto distribution (GPD) framework for modeling the time-dependent behavior of the peak over threshold (POT) in extreme smog (PM<sub>2.5</sub>) time series. First, unlike static GPD, three dynamic autoregressive conditional generalized Pareto (ACP) models are introduced. Specifically, in these three dynamic models, the exceedances of air pollutant concentration are modeled by a GPD with time-dependent scale and shape parameters conditioned on past PM<sub>2.5</sub> and other air quality factors (SO<sub>2</sub>, NO<sub>2</sub>, CO) and weather factors (daily average temperature, average relative humidity, average wind speed). Second, unlike the recent studies of ACP models, we impose a logistic function autoregressive structure on the scale and shape parameters of the ACP models, which has simple calculation and flexible modeling for the scale and shape parameters, since the logistic function is used to mean that the changes in the long memory parameter occur in a continuous manner and often applied in time series models. Third, the model averaging method is applied to improve predictive performance using AIC and BIC criteria to select combined weights of the three ACP models. In addition, based on goodness-of-fit tests, the thresholds of the three ACP models are chosen by eight automatic threshold selection procedures to avoid subjectively assigning a certain value as the threshold. Maximum likelihood estimation (MLE) is employed to estimate parameters of the ACP models and its statistical properties are investigated. Various simulation studies and an example of real data in PM<sub>2.5</sub> time series demonstrate the superiority of the proposed ACP models and the stability of the MLE.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144584716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-07-06DOI: 10.1111/risa.70075
Sheree Pagsuyoin, Calvin Ng, Nerissa Molejon, Yan Luo
{"title":"Coupling wastewater-based epidemiology with data-driven machine learning for managing public health risks.","authors":"Sheree Pagsuyoin, Calvin Ng, Nerissa Molejon, Yan Luo","doi":"10.1111/risa.70075","DOIUrl":"https://doi.org/10.1111/risa.70075","url":null,"abstract":"<p><p>Traditional health surveillance methods play a critical role in public health safety but are limited by the data collection speed, coverage, and resource requirements. Wastewater-based epidemiology (WBE) has emerged as a cost-effective and rapid tool for detecting infectious diseases through sewage analysis of disease biomarkers. Recent advances in big data analytics have enhanced public health monitoring by enabling predictive modeling and early risk detection. This paper explores the application of machine learning (ML) in WBE data analytics, with a focus on infectious disease surveillance and forecasting. We highlight the advantages of ML-driven WBE prediction models, including their ability to process multimodal data, predict disease trends, and evaluate policy impacts through scenario simulations. We also examine challenges such as data quality, model interpretability, and integration with existing public health infrastructure. The integration of ML WBE data analytics enables rapid health data collection, analysis, and interpretation that are not feasible in current surveillance approaches. By leveraging ML and WBE, decision makers can reduce cognitive biases and enhance data-driven responses to public health threats. As global health risks evolve, the synergy between WBE, ML, and data-driven decision-making holds significant potential for improving public health outcomes.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144576193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-07-06DOI: 10.1111/risa.70072
Sam Li-Sheng Chen, Chen-Yang Hsu, Tin-Yu Lin, Amy Ming-Fang Yen, Tony Hsiu-Hsi Chen
{"title":"Personalized risk score for post-COVID-19 condition: Bayesian directed acyclic graphic approach.","authors":"Sam Li-Sheng Chen, Chen-Yang Hsu, Tin-Yu Lin, Amy Ming-Fang Yen, Tony Hsiu-Hsi Chen","doi":"10.1111/risa.70072","DOIUrl":"https://doi.org/10.1111/risa.70072","url":null,"abstract":"<p><p>Post-COVID-19 condition (PCC) has gained traction currently in the post-pandemic era. To address this, we utilized a Bayesian directed acyclic graphic (DAG) model to develop a personalized composite risk score (CRS) for PCC, based on the tabular data derived from a comprehensive meta-analysis. Our risk assessment model incorporates 215 combinations of risk factors, including personal demographic and health-related profiles, across 41 studies involving over 860,000 COVID-19 cases. The CRS ranges from 0 to 500, categorizing patients into risk quartiles and estimating PCC probability across SARS-CoV-2 variants of concerns, including Wild/D614G/Alpha, Delta, and Omicron BA.1/BA.2. External validation demonstrated accurate predictions, though higher risk scores showed slight deviations, particularly in BA.5 Omicron subset. The risk assessment model is not only adaptable for incorporating new evidence as SARS-CoV-2 subvariants emerge but also very valuable in facilitating the optimal individualized medical care for PCC patients and prioritizing a spectrum of risk groups for early PCC diagnosis. Notably, the adaptability of Bayesian DAG model enhances PCC risk prediction, enabling data integration for evolving SARS-CoV-2 contexts and informing healthcare resource allocation for high-risk groups.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144576194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Risk-aware autonomous search and rescue with multiagent reinforcement learning.","authors":"Aowabin Rahman, Salman Shuvo, Samrat Chatterjee, Mahantesh Halappanavar, Terje Aven","doi":"10.1111/risa.70067","DOIUrl":"https://doi.org/10.1111/risa.70067","url":null,"abstract":"<p><p>Autonomous navigation in dynamic high-consequence environments, such as search and rescue (SAR) missions, often relies on multiagent robotic systems that need to learn and adapt to changing conditions. Adversarial risks can introduce further challenges in such a setting where an autonomous agent may exhibit deviations in their learned actions from training to testing. Moreover, the uncertain environment itself may also evolve with additional obstacles that can emerge during testing compared to conditions when algorithmic training of autonomous agents was performed. In this paper, we first focus on mathematically formulating the autonomous SAR problem via a risk-aware multiagent reinforcement learning approach. Thereafter, we design and implement numerical experiments to evaluate our approach under diverse hazard scenarios with a centralized training and decentralized testing paradigm. Finally, we discuss our results and steps for further research.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144567782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-06-29DOI: 10.1111/risa.70058
Si-Qi Li
{"title":"Seismic risk and loss estimation models for building clusters considering the effects of the earthquake intensity and temperature field.","authors":"Si-Qi Li","doi":"10.1111/risa.70058","DOIUrl":"https://doi.org/10.1111/risa.70058","url":null,"abstract":"<p><p>Earthquake disasters and extreme temperature fields directly affect the vulnerability and economic losses of building clusters. Seismic intensity measures and structural capacity indicators are widely used to evaluate the seismic fragility and economic losses of buildings. However, the dual effects of low-temperature fields and seismic intensity on the estimation of building economic damage have been considered less. This article proposes a structural seismic hazard model that considers the coupling effect of the seismic intensity and temperature field, utilizing the theory of seismic hazard and risk assessment. An innovative structural seismic vulnerability and loss evaluation function based on the influence of the temperature field was proposed. Four types of building damage samples (170,388,204 sq. m) and temperature data were statistically classified from 12 typical earthquakes (6 in low-temperature fields and 6 in normal-temperature fields) in Xinjiang, China, between 1995 and 2024. An economic loss assessment model for regional building clusters considering the temperature field and seismic intensity measures was developed using probabilistic vulnerability and risk analysis methods. A function for evaluating the actual seismic losses and vulnerability of structures under different temperature fields using nonlinear regression and cumulative economic loss functions is proposed. A structural economic loss evaluation curve is generated considering the effects of temperature fields and intensity measures. A novel calculation method for evaluating the number of people who have lost their homes after an earthquake has been proposed, which combines the dual effects of the temperature field and seismic intensity measures on structural vulnerability.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144529469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Risk AnalysisPub Date : 2025-06-29DOI: 10.1111/risa.70071
Rebekah Wicke, Chelsea L Ratcliff, Alice Fleerackers, Yidi Wang, Andy J King, Jakob D Jensen
{"title":"Preprints in COVID-19 news coverage: Comparing student and general population perceptions of preliminary science about booster vaccination.","authors":"Rebekah Wicke, Chelsea L Ratcliff, Alice Fleerackers, Yidi Wang, Andy J King, Jakob D Jensen","doi":"10.1111/risa.70071","DOIUrl":"https://doi.org/10.1111/risa.70071","url":null,"abstract":"<p><p>News framing of preprint research during the COVID-19 pandemic varied widely, with some articles reporting the findings of preprint studies with a high degree of certainty and others highlighting the preliminary and unpublished nature of the work. As publicly available research articles that have not yet been peer-reviewed, preprints represent a unique form of scientific uncertainty in risk communication contexts, and we lack a complete picture of how public audiences respond to transparency about this uncertainty. Replicating and extending prior work, we examined how preprint disclosures and lexical hedging influenced COVID-19 booster vaccine attitudes and intentions in a college student sample (N = 837) and a general population sample (N = 431). Participants in both groups perceived the disclosure of preprint status. However, neither preprint disclosure nor lexical hedging had a direct effect on perceived trustworthiness of the news article or the scientists, nor on booster attitudes or intentions, replicating our prior findings. As preprints have begun to receive more attention in the media, it is important to make sure the public is properly educated about their tentative nature.</p>","PeriodicalId":21472,"journal":{"name":"Risk Analysis","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144529468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}