Article
Health Care Sciences & Services
Yusuke Saigusa, Shinto Eguchi, Osamu Komori
Summary: The generalized linear mixed model (GLMM) is a common method for analyzing longitudinal and clustered data in biological sciences. However, issues of model complexity and misspecification can arise. This paper extends the standard GLMM to a nonlinear mixed-effects model based on quasi-linear modeling, providing an estimation algorithm and a conditional AIC for the proposed model. Performance under model misspecification is evaluated in simulation studies, and the proposed model is shown to capture heterogeneity in respiratory illness data.
STATISTICAL METHODS IN MEDICAL RESEARCH
(2022)
Article
Fisheries
Joseph E. Fader, Jamie A. Marchetti, Robert S. Schick, Andrew J. Read
Summary: Depredation by marine predators in pelagic longline fisheries causes significant economic losses. This study used a novel modeling approach to estimate catch removal by odontocetes in the Hawai'i deep-set longline fishery and found that depredation resulted in approximately 100 tons of lost biomass and 1 million USD in economic value during 2012-2018. The study also identified spatiotemporal patterns and hotspots of depredation, providing valuable insights for assessing the impacts of depredation in similar fisheries.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Business, Finance
Qing Zeng, Yusui Tang, Hua Yang, Xi Zhang
Summary: This study re-examines the relationship between U.S. stock market volatility and economic policy uncertainty (EPU) using the mixed-frequency dynamic threshold model. The empirical results show that EPU has a time-varying threshold effect. Moreover, combining the dynamic threshold with the Markov-regime Mix-frequency model (MS-MIDAS), this study finds that the new model can significantly improve predictive performance compared to other competing models.
FINANCE RESEARCH LETTERS
(2024)
Article
Economics
Sania Ashraf, P. Jithin, Skander Slim, Roshen Najeeb
Summary: This paper investigates the impact of global value chains (GVCs) participation on economic complexity for a sample of underdeveloped, moderately developed, and developed countries. It finds that GVCs participation has adverse effects on economic complexity, except for countries with higher economic complexity. Moreover, forward participation is negatively associated with economic complexity, while backward participation has a positive impact on economic complexity in more complex economies.
ECONOMIC ANALYSIS AND POLICY
(2023)
Article
Economics
William Ginn
Summary: This study uses a panel local projections model to examine the impact of economic policy uncertainty on real equity returns. The results show that economic policy uncertainty has a negative effect on real equity returns. Furthermore, the study reveals that during non-expansionary periods, uncertainty amplifies the losses in real equity returns, with a twice as high immediate impact and greater persistence.
Article
Mathematics, Applied
Sunisa Theswan, Sotiris K. Ntouyas, Jessada Tariboon
Summary: In this paper, a coupled system of Hilfer-type nonlinear proportional fractional differential equations supplemented with mixed multi-point and integro-multi-point boundary conditions is investigated. Standard methods from functional analysis, especially fixed point theory, are utilized. Two existence results are established using the Leray-Schauder's alternative and the Krasnosel'skii's fixed point theorem, while the existence of a unique solution is achieved via the Banach's contraction mapping principle. Numerical examples are presented to illustrate the main theoretical results. The results of this study are novel, have wider applicability, generate a variety of new results as special cases, and contribute to the existing literature on nonlocal systems of nonlinear & psi;-Hilfer generalized fractional proportional differential equations.
Article
Ecology
Erik Blystad Solbu, Bert van der Veen, Ivar Herfindal, Knut Anders Hovstad
Summary: This paper demonstrates the use of generalized linear mixed models to study dynamic species abundance distributions, with simulations and case studies on fish and bat communities. The main finding is that species heterogeneity is the main factor influencing community similarity.
Article
Multidisciplinary Sciences
Martin A. Stoffel, Shinichi Nakagawa, Holger Schielzeth
Summary: The coefficient of determination R-2 quantifies the variance explained by regression coefficients in a linear model. partR2 is an R package based on linear mixed-effects models that quantifies part R-2 for fixed effect predictors, providing reliable estimates and confidence intervals for each predictor.
Article
Biochemical Research Methods
Yuxin Song, Li'ang Yang, Li Jiang, Zhiyu Hao, Runqing Yang, Pao Xu
Summary: In this study, we extended GRAMMAR to handle binary diseases and reduced polygenic effects by regulating genomic heritability, which simplified GLMM-based association analysis in large-scale data and improved the statistical power to detect QTNs.
BRIEFINGS IN BIOINFORMATICS
(2022)
Article
Biology
Shuangshuang Xu, Marco A. R. Ferreira, Erica M. Porter, Christopher T. Franck
Summary: We propose a Bayesian model selection approach for generalized linear mixed models (GLMMs) that uses a pseudo-likelihood method to approximate the integrated likelihood function. Our approach includes flat priors for fixed effects and offers choices of approximate reference priors and half-Cauchy priors for random effects variances. We introduce a fractional Bayes factor approach to obtain posterior probabilities of competing models. Simulation studies demonstrate the favorable performance of our approach compared to other commonly used Bayesian methods.
Article
Oceanography
Zaw Myo Win, David Cook, Brynhildur Daviosdottir
Summary: The study examines the economic value of fuel externalities in Icelandic whale watching industry. It calculates the marginal external costs of diesel and electric vessels, and compares the outcomes between different types of vessels. The results highlight the potential benefits of transitioning to electric boats.
OCEAN & COASTAL MANAGEMENT
(2023)
Review
Psychology, Multidisciplinary
Roser Bono, Rafael Alarcon, Maria J. Blanca
Summary: This study focused on the utilization of GLMMs in psychology and found an increasing trend in their usage over time. However, the majority of articles did not provide sufficient information about GLMMs, indicating a need for improved report quality following current recommendations.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Alessia Buratin, Chiara Romualdi, Stefania Bortoluzzi, Enrico Gaffo
Summary: Identifying differentially expressed circular RNAs (circRNAs) is crucial for understanding the molecular basis of phenotypic variation. Multiple methods have been developed to detect circRNAs, and combining these tools is a common approach to improve detection rate and robustness. However, integrating circRNA expression estimates into downstream analysis remains unclear. This study presents a novel solution that simultaneously tests circRNA differential expression using quantifications from multiple algorithms.
COMPUTATIONAL AND STRUCTURAL BIOTECHNOLOGY JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Boris Forthmann
Summary: This study presents a method to estimate the Q model using generalized linear mixed models, which is a prominent approach for assessing researcher capacity. By using statistical software packages, estimates of researcher capacity and other Q model parameters can be obtained easily. In a large dataset, the Poisson Q model was found to have slightly better predictive accuracy than the original normal Q model. The reliability of Q parameter estimates depended heavily on the number of publications, with reliability increasing as the number of papers increased. The future and limitations of the Q model in estimating researcher capacity are thoroughly discussed.
Article
Mathematics, Applied
Jinxia Cen, Akhtar A. Khan, Dumitru Motreanu, Shengda Zeng
Summary: This paper investigates the inverse problem of estimating a discontinuous parameter in a quasi-variational inequality involving multi-valued terms. The authors prove that the parameter-to-solution map has weakly compact values and develop an abstract regularization framework with a new existence result.
Article
Fisheries
Miguel Petrere Jr, Davi Butturi-Gomes
Summary: This short communication aims to raise awareness about the misuse of confidence intervals in Ecology and Fisheries statistical models that ignore the lack of independence.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Peter-John F. Hulson, Benjamin C. Williams
Summary: This study evaluates the impact of considering ageing error and growth variability on the determination of input sample size (ISS) in statistical catch-at-age assessment models. The results show that including these sources of uncertainty decreases the ISS determined through bootstrap methods. This indicates that there is more variability in age composition and conditional age-at-length data than previously accounted for. Including these sources of uncertainty improves the estimation of ISS and subsequently improves the quality of stock assessment models.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jason M. Cope
Summary: Fishery resource assessment is a complex and challenging task, but with the use of different analysis methods and tools, effective management guidance can be provided even with limited data and resources.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Regina L. Cunha, Joana I. Robalo, Sara M. Francisco, Ines Farias, Rita Castilho, Ivone Figueiredo
Summary: Recent advances in genomics have greatly contributed to the assessment of fish stocks by providing precise identification of genetic boundaries. This study used a genotyping-by-sequencing approach to reveal the existence of an additional genetic cluster of blackspot seabream in the northeast Atlantic, which was not previously identified. Factors such as ocean circulation patterns and local upwelling may play a role in the genetic differentiation observed in this study.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Huihua Lee, Mark N. Maunder, Kevin R. Piner
Summary: Estimating growth is important for fish population assessment. Integrated assessment models and the influence of misfitting size composition data have renewed interest in how growth is modeled. The available data types control how the length-at-age relationship is estimated. Estimating length-at-age is complex due to multiple sources of biological variability and difficulties in obtaining representative samples.
FISHERIES RESEARCH
(2024)
Article
Fisheries
A. Ladino, I. Perez-Arjona, V. Espinosa, M. Chillaron, V. Vidal, L. M. Godinho, G. Moreno, G. Boyra
Summary: This study examines the acoustic properties of skipjack tuna and Atlantic mackerel, both bladderless pelagic fish species, and explains the significant differences observed. The research shows that the differences in material properties of their tissues predict a more than 10 dB greater reduced target strength in skipjack compared to mackerel at certain frequencies.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Nelly Pena-Cutimbo, Cristel Cordero-Maldonado, Clara Ortiz-Alvarez, Joanna Alfaro-Shigueto, Jeffrey C. Mangel
Summary: Bycatch is a global problem for marine megafauna. This study assessed the bycatch interactions of the Peruvian artisanal purse-seine fishery in 2019 and found that all taxa groups were affected by bycatch. Dusky dolphins, guanay cormorants, and eagle rays were the most frequently reported bycatch species.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jen-Ming Liu, Po-Yuk So
Summary: The set-net fishery is an environmentally friendly fishery posing little risk to the marine ecosystem. This study identified ocean temperature, sea surface factors, and climatic factors as the main factors affecting the installation of set-nets.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Josie L. Palmer, Carina Armstrong, Hasan D. Akbora, Damla Beton, Cigdem Caglar, Brendan J. Godley, Kristian Metcalfe, Meryem Ozkan, Robin T. E. Snape, Annette C. Broderick
Summary: Small-scale fisheries are vital for global food security and cultural heritage, but the lack of information hampers effective management and mitigation of ecological impacts. This study provides the first comprehensive overview of the small-scale fishery fleet in Northern Cyprus. The fleet operates mainly over the continental shelf, using static and demersal gear types, and catches a diverse range of species, some of which are threatened. The findings can be used to improve fisheries management and conservation measures.
FISHERIES RESEARCH
(2024)