Article
Economics
Lukas Fryd, Ondrej Sokol
Summary: Subsidies for agriculture in the European Union have long been a debated issue, and research shows that they have a negative impact on farm efficiency, with the effect varying depending on the technical efficiency of the farm.
SOCIO-ECONOMIC PLANNING SCIENCES
(2021)
Article
Engineering, Industrial
Filippo Visintin, Davide Aloini, Simone Gitto, Sara Vannelli, Daniele Di Feo
Summary: This study applies a two-stage bootstrap data envelopment analysis (DEA) to assess the efficiency of radiology units in public hospitals. The first stage involves a bootstrap DEA analysis to identify efficient units by testing the hypotheses of variable returns to scale. In the second stage, a bootstrap truncated regression is used to examine the effects of four explanatory variables (chief radiology technologist's years of service, presence of customer satisfaction survey systems, age of the equipment, and output variety) on the technical efficiency of radiology units. Surprisingly, the results show that newer equipment leads to decreased productivity, while seniority of the chief radiology technologist and the presence of customer satisfaction survey systems do not contribute to better productivity. On the other hand, a variety of output positively influences productivity.
FLEXIBLE SERVICES AND MANUFACTURING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Nada Milenkovic, Boris Radovanov, Branimir Kalas, Aleksandra Marcikic Horvat
Summary: This research focuses on the sustainability of the intermediate function of banks in the Western Balkans from 2015 to 2019. The study utilizes the Data Envelopment Analysis (DEA) model and regression analysis to determine efficiency levels and the influence of factors such as bank size, type, and mergers and acquisitions. The results show variations in efficiency levels across countries and indicate that larger banks tend to have higher relative efficiency.
Article
Energy & Fuels
Elif E. Demiral, Umit Saglam
Summary: The study found that 32 states in the US operate efficiently in terms of eco-efficiency, with 5 states performing at the most optimal scale, 17 states having considerable potential for boosting their productive efficiencies, and 28 states being overinvested in input variables. The non-radial DEA models show that the states' capital efficiency is very high, while energy and emission efficiencies are very low. The states' ecoproductivity is relatively higher than the eco-efficiency levels.
Article
Management
Laurent Cavaignac, Audrey Dumas, Romain Petiot
Summary: This study analyzed the productive performance and efficiency determinants of 132 firms in 2016, revealing low and heterogeneous efficiency levels with most 3PLs exhibiting increasing returns-to-scale. Specialization is preferred over diversification in the industry, and only certain certifications improve efficiency levels.
INTERNATIONAL JOURNAL OF LOGISTICS-RESEARCH AND APPLICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Raul Perez-Reyes, Beatriz Tovar
Summary: The study analyzed for the first time the impact of the structural reform of the Peruvian electricity market in the 1990s on the technical efficiency levels of distribution companies, as well as the influence of some firm specific explanatory variables on efficiency using a second stage Tobit model. The nine alternative models estimated confirmed that the incentives generated by the reform process led to the firms becoming more efficient. Private management and the ratio of low voltage sales to medium voltage sales positively affect efficiency, while investment per customer is negatively correlated to it.
Article
Environmental Sciences
Fraj Chemak, Houda Mazhoud, Zouhair Rached, Anissa Gara, Rahma Rahmeni, Habib Ghannem
Summary: This study investigates the performance of the irrigated cereal sector in Tunisia and identifies potential determinants to improve water productivity. The results indicate that both technical efficiency and water use efficiency need to be improved. Saving irrigation water is more important than optimizing production for enhancing water productivity.
Article
Biodiversity Conservation
Fanlin Meng, Wenping Wang
Summary: This paper evaluates the eco-efficiency of China's provinces from 2005 to 2020, finding that the eastern region has higher eco-efficiency compared to the central, western, and northeastern regions, with the western region showing the highest environmental protection stage eco-efficiency. The Belt and Road initiative has a significantly positive impact on the industrial eco-economic system, but a negative effect on the manufacturing stage.
ECOLOGICAL INDICATORS
(2021)
Article
Economics
Wei Wei, Ying Han, Mohammad Zoynul Abedin, Jingjing Ma, Shanglei Chai
Summary: By using DEA-BCC and DEA-Malmquist models, this study examines the regional disparities of technical efficiency and total factor productivity in the Chinese power industry. The results indicate a development pattern of emphasizing market over environment, but some progress has been made in green technology and environmental regulations. However, the lack of long-term incentives hinders the continuous development of the power market reform.
Article
Computer Science, Artificial Intelligence
Mohammad Khoveyni, Robabeh Eslami
Summary: This study proposes an input-output-oriented linear model in network data envelopment analysis (DEA) to measure the overall efficiency of two-stage decision-making units (DMUs) with shared resources. Comparative analysis shows the superiority of our model over existing models, and an empirical example demonstrates the applicability of our proposed model.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Energy & Fuels
Francis Atta Sarpong, Jianmin Wang, Benjamin Blandful Cobbinah, Jesse Jackson Makwetta, Jie Chen
Summary: This study adopts the Data Envelopment Analysis method to measure energy efficiency among nine selected West African states and analyzes the factors influencing energy efficiency. The study finds that energy efficiency in West Africa has improved, with four countries having an efficiency level above 100%. Population shows a significant and positive association with energy efficiency, while gross national income and urbanization have a negative influence. The study emphasizes the need for further improvement in energy efficiency by reducing carbon dioxide emissions and recommends West African leaders to adopt global benchmarks of sustainable environmental practices.
ENERGY STRATEGY REVIEWS
(2022)
Article
Environmental Studies
Zhili Zuo, Haixiang Guo, Yonglin Li, Jinhua Cheng
Summary: Improving technological innovation efficiency and eco-efficiency is crucial for achieving a high-quality and sustainable mining industry in China. This study applies a two-stage DEA model to measure the mining technological innovation efficiency (MTIE), mining eco-efficiency (MEE), and mining comprehensive efficiency (MCE) of 30 provinces in China. The findings show the impact of mining economic development on MCE, regional differences in MTIE and MEE, and the need for efficiency optimization through different paths. Policy recommendations are provided to guide the high-quality development of the Chinese mining industry.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2022)
Article
Green & Sustainable Science & Technology
Evelin Krmac, Boban Djordjevic
Summary: Ports are vital hubs for logistical activities and economic growth, but they also have negative impacts such as energy consumption and air pollution. Policies and measures have been developed to reduce these impacts, and seeking best practices has proven effective. This study uses DEA models to measure port environmental efficiency and compares one-stage and two-stage models using case studies of the ports of Koper and Dublin. The results provide best practices and highlight the differences between the two models, with distance metrics used to identify necessary improvements for inefficient decision-making units (DMUs) to achieve best practices.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Environmental Sciences
Osman Inanc Guney
Summary: Efficiency assessment of wheat farmers in Adana, Turkey was conducted using Data Envelopment Analysis and Tobit regression model, revealing that reducing input usage can increase technical efficiency. Factors such as farmland ownership, total farm area, and procuring inputs in cash positively influence technical efficiency, while experience in wheat farming has a negative effect.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2021)
Article
Economics
V. V. Spitsin, A. Mikhalchuk, Darko B. Vukovic, L. Y. Spitsina
Summary: The aim of this study is to investigate the technical efficiency of high-technology industries, taking into account the location and size of enterprises. The results suggest that the technical efficiency of most high-technology industries is negatively affected by economic crises. Furthermore, large enterprises, enterprises located in agglomeration centers, and enterprises using borrowed capital demonstrate better technical efficiency.
JOURNAL OF THE KNOWLEDGE ECONOMY
(2023)
Article
Operations Research & Management Science
Ester Gutierrez, Sebastian Lozano
Summary: This paper assesses the relative efficiency of the forest sector in 28 EU/EFTA countries during the period 2010-2015 using DEA, and identifies factors that influence efficiency. The results can provide guidance for roundwood production.
ANNALS OF OPERATIONS RESEARCH
(2022)
Article
Mathematics, Applied
Manuel Arana-Jimenez, M. Carmen Sanchez-Gil, Sebastian Lozano
Summary: This paper discusses the problem of efficiency assessment using Data Envelopment Analysis (DEA) when the input and output data are given as fuzzy sets. The authors propose a fuzzy extension of the measure of inefficiency proportions and provide fuzzy input and output targets.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2022)
Article
Management
Narges Soltani, Zijiang Yang, Sebastian Lozano
Summary: This paper introduces a new DEA ranking method based on multi-directional efficiency measure (MEM) that considers all improvement directions without relying on specific ones for ranking. The method can rank both efficient and inefficient units without prior information requirements. The proposed approach is compared with three other state-of-the-art rankings using a real-life dataset.
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
(2022)
Article
Operations Research & Management Science
Laura Calzada-Infante, Sebastian Lozano
Summary: This paper extends the DN analysis method to input and output data involving multiple time periods. The proposed TDN includes OUs from each time period and is visualized using various filters and node layouts. Network metrics are used to evaluate the efficiency of OUs in different periods and the corresponding productivity change.
ANNALS OF OPERATIONS RESEARCH
(2022)
Article
Management
Sebastian Lozano, Somayeh Khezri
Summary: This study proposes a new approach for evaluating the efficiency of decision-making units with interval data, introducing a potential-based measure of efficiency. The methodology is demonstrated using a dataset related to the performance of branches of an insurance company in Iran and compared with existing methods.
IMA JOURNAL OF MANAGEMENT MATHEMATICS
(2023)
Article
Hospitality, Leisure, Sport & Tourism
Julio Lozano-Ramirez, Manuel Arana-Jimenez, Sebastian Lozano
Summary: This study evaluates the sustainability efficiency of tourism in 27 countries in the European Union from 2015 to 2019 using data analysis envelopment methodology and various economic, social, and environmental indicators. The results provide valuable information on sustainable tourism practices and support the challenging task of rebuilding the sector and resuming the pre-pandemic trend of increasing tourism sustainability.
CURRENT ISSUES IN TOURISM
(2023)
Article
Operations Research & Management Science
Sebastian Lozano, Gabriel Villa
Summary: This paper introduces a multi-objective fixed-sum output (FSO) approach that considers factors such as the total number of medals awarded. The approach aims to set all output targets as close as possible to their ideal values. A secondary goal of minimizing the sum of absolute changes in the number of medals is also considered. The proposed approach has been applied to the results of the Tokyo 2020 Olympic Games and compared with FSO and non-FSO DEA methods.
ANNALS OF OPERATIONS RESEARCH
(2023)
Article
Management
Sebastian Lozano
Summary: This paper presents a model that combines fixed-sum DEA technology with bargaining methods to deal with input or output variables with fixed total amounts. By computing the Nash bargaining solution and using an enhanced efficiency measure, efficient analysis for all units is achieved.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2023)
Article
Environmental Studies
Rasmus Nielsen, Sebastian Villasante, Jose Manuel Fernandez Polanco, Jordi Guillen, Ignacio Llorente Garcia, Frank Asche
Summary: There have been negative impacts of Covid-19 on the aquaculture sector in the European Union, with decreased income and increased costs. However, there are also opportunities for some. Data from Denmark and Spain show moderate to no impacts of Covid-19 on aquaculture production, except for turbot prices.
Article
Computer Science, Artificial Intelligence
Majid Zadmirzaei, Fahimeh Hasanzadeh, Andres Susaeta, Ester Gutierrez
Summary: Undesirable outputs of industrial economic activities, such as carbon dioxide and other pollutants, have become a global concern due to their harmful effects on the climate. This study proposes a novel environmental efficiency model that combines data envelopment analysis (DEA) with predicting artificial intelligence algorithms. The findings show that a significant percentage of decision-making units (DMUs) in Iranian forest management operate at low efficiency levels, but can improve their efficiency by adopting the combined approach.
Article
Engineering, Industrial
Belarmino Adenso-Diaz, Sebastian Lozano
Summary: This paper presents a DEA approach to assess the efficiency of company's shipments and haulers. It benchmarks shipments first against all shipments of the same hauler and then against all shipments of all haulers. The efficiency of each shipment and hauler can be determined. The proposed approach is useful to assess price quotes and negotiate better prices.
INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE-OPERATIONS & LOGISTICS
(2023)
Article
Green & Sustainable Science & Technology
Jordi Guillen, Natacha Carvalho, Griffin Carpenter, Antonio Borriello, Angel Calvo Santos
Summary: Energy prices increased sharply due to the Russian invasion of Ukraine, impacting global economies significantly. The fishing sector in the EU, which heavily relies on fuel, faced high fuel prices that jeopardized its viability. The European Commission responded with emergency measures and financial support to ensure the sustainability of the fishing sector.
Article
Environmental Studies
Ester Gutierrez-Moya, Sebastian Lozano, Belarmino Adenso-Diaz
Summary: In this study, a complex network analysis of global fertiliser trade during the period 2014-2018 was conducted to investigate its structure at both global and local levels. The analysis identified communities, main players, motifs, structural holes, and brokerage roles. The trade links' persistency and variability were also analyzed. The Global Fertiliser Trade Network was found to be a small-world network with scale-free properties, characterized by reciprocity and centralization. The network had a core-periphery structure with five core countries (EU, USA, China, Brazil, and the Russian Federation) trading among themselves and with most periphery countries.
Article
Fisheries
Griffin Carpenter, Natacha Carvalho, Jordi Guillen, Raul Prellezo, Sebastian Villasante, Jesper L. Andersen, Edo Avdic Mravlje, Joerg Berkenhagen, Cecile Brigaudeau, Brian Burke, Angel Calvo Santos, Suzana Cano, Franca Contini, Jose-Maria Da-Rocha, Irina Davidjuka, Francisco Manuel Fernandez Martinez, Ignacio Fontaneda-Lopez, Monica Gambino, Elena Garcia Caballero, Olivier Guyader, Jeppe Herring, Geert Hoekstra, Myrto Ioannou, Emmet Jackson, Armelle Jung, Edvardas Kazlauskas, Michael Keatinge, Emil Kuzebski, Sophie Leonardi, Christelle Le Grand, Janek Lees, Carmen Margarita Mancebo-Robledo, Marie-Dominique Minne, Arie Mol, Marta Moran Quintana, Simona Nicheva, Heidi Pokki, Joao Ramos O. Do, Alexandre Rodriguez, Rosaria Felicita Sabatella, Andrew Sciberras, Arnaud Souffez, Constantin Stroie, Hanna Swahnberg, Irene Tzouramani, Maria Valiente Viana, Katrien Verle, Jarno Virtanen, Ivana Vukov, Kolyo Zhelev
Summary: This paper analyzes the impact of the COVID-19 pandemic on the profitability of EU fishing fleets. Using nowcasting techniques, the study estimates the economic performance of the EU fishing fleet in 2020 and 2021. The results show that the economic impact of COVID-19 on this sector was smaller than expected, with overall profits remaining positive. Factors such as low fuel prices and government support have contributed to this outcome. The impact varies across different fishing fleets, with small-scale fleets and those in the Mediterranean and Black seas being more affected than large-scale fleets and those in the Northeast Atlantic.
AQUATIC LIVING RESOURCES
(2023)
Article
Fisheries
Hunter S. Bailey, Ashley N. Fincannon, Lee A. Fuiman
Summary: This study investigated the transfer of fatty acids from broodstock diets to eggs and the time needed for the eggs to equilibrate to the diet in Southern flounder. The findings indicate that different diet treatments significantly affect the fatty acid composition of eggs, and it takes 8-16 weeks for the eggs to adapt to changes in the adult diet. These results are important for improving broodstock diets and feeding protocols in stock-enhancement programs.
Article
Fisheries
Yu Liu, Mingtao Lei, Hector Victor, Yan Wang
Summary: This study confirms the feasibility of replacing raw fish diet with a formulated diet in commercial farming of large yellow croaker, which can increase fish survival and yield, and reduce feed cost and body lipid deposition.
Article
Fisheries
Xiaoyan Zhang, Lize San, Yucong Yang, Yuehong Tao, Jiangong Ren, Yufeng Liu, Zhongwei He, Jiashuo Di, Ziteng Pei, Guixing Wang, Jilun Hou
Summary: Gynogenesis is an effective technique for establishing homogeneous lines and confirming potential chromosomal mechanisms of sex determination in fish. This study successfully induced gynogenetic families in Thamnaconus modestus and established a complete method for gynogenesis induction.
Article
Fisheries
Julieta C. Martinelli, Megan Considine, Helen R. Casendino, Carolyn M. Tarpey, Isadora Jimenez-Hidalgo, Jacqueline L. Padilla-Gamino, Teri L. King, Lorenz Hauser, Steven Rumrill, Chelsea L. Wood
Summary: Shell-boring polychaetes have caused significant damage to mariculture operations worldwide, particularly in the US Pacific region. This study provides a comprehensive dataset on the prevalence, species distribution, and environmental associations of these parasites, highlighting the impact of season, culturing methods, and environmental factors on infestation.
Article
Fisheries
Juan Gao, Xueshan Li, Kangle Lu, Kai Song, Jian Zhang, Ling Wang, Chunxiao Zhang
Summary: This study investigated the effects of dietary protein levels on growth performance, antioxidant capacity, digestive enzyme activity, and metamorphosis rate of bullfrog tadpoles. The optimal dietary protein level for bullfrog tadpoles was estimated to be 42.49%-46.50% of the diet.
Article
Fisheries
Qiang Li, Lijun Duan, Dongsheng Jin, Yuxin Chen, Yirong Lou, Qianjin Zhou, Zhongjie Xu, Fangjie Chen, Hongxian Chen, Guizong Xu, Maocang Yan, Guanjun Yang, Jianfei Lu, Yanjun Zhang, Jiong Chen
Summary: This study developed a centrifugal microfluidic chip with on-chip RPA to detect five pathogenic microorganisms. The chip enabled the parallel analysis of six genetic markers from a single sample and allowed for the highly automated detection of multiple samples. Compared with PCR and DNA sequencing, the on-chip RPA assay showed high sensitivity and specificity for detecting multiple pathogens in shrimp aquaculture.
Article
Fisheries
Xingchen Huo, Pengxu Wang, Fengxia Zhao, Qian Liu, Qingqing Tian, Lingjie Tang, Maolin Lv, Zhaohui Wei, Chunrong Yang, Jianguo Su
Summary: Bacterial diseases in aquaculture ponds have negative effects on sustainable development. The use of composite I20 biotherapy has been shown to effectively treat bacterial diseases in bullfrog ponds, providing a new strategy for controlling bacterial diseases in aquaculture.
Article
Fisheries
Peng Yin, Takaya Saito, Per Gunnar Fjelldal, Bjorn Tharandur Bjornsson, Sofie Charlotte Remo, Sandeep Sharma, Rolf Erik Olsen, Kristin Hamre
Summary: This study aims to investigate the effect of seasonal changes in temperature and photoperiod on the redox metabolism of Atlantic salmon at the molecular level. The research findings suggest that the changing photoperiod and temperature influenced the redox metabolism of Atlantic salmon, highlighting the importance of oxidative status in the ecological implications.
Article
Fisheries
Nicholas Oppong Mensah, Jeffery Kofi Asare, Emmanuel Tetteh-Doku Mensah, Ernest Christlieb Amrago, Frank Osei Tutu, Anthony Donkor
Summary: This study investigates aquaculture farmers' preference for climate-smart aquaculture insurance products, the challenges they face, and their preferred insurance coverage. The results show that farmers prefer Climate-Induced Aquaculture Stock Mortality Insurance and the most significant constraint is the delay in claim settlement.
Article
Fisheries
Qiu-Ping Chai, Pei Wu, Wei-Dan Jiang, Yang Liu, Hong-Mei Ren, Xiao-Wan Jin, Lin Feng, Xiao-Qiu Zhou
Summary: The study found that appropriate levels of potassium diformate (KDF) can enhance the immune defense and mediate the inflammatory process in fish, possibly through the regulation of T cell differentiation via JAK-STAT and NF-kappa B signaling pathways.
Article
Fisheries
Tian Zhu, Haomin Jia, Haopeng Zhang, Yujing Xiao, Cui Han, Jiaxin Yang
Summary: Chicken manure has significant effects on the cultivation of Chlorella and rotifers. The optimal amount of chicken manure extract for continuous cultivation is 10 mLL-1. Chicken manure can promote the growth of Chlorella and improve the fatty acid composition, indirectly enhancing the growth condition and fatty acid content of rotifers.
Article
Fisheries
Zheng Luo, Yang Yu, Zhenning Bao, Fuhua Li
Summary: This study analyzed the heritability and genetic correlation of two growth traits in Pacific white shrimp and evaluated the genomic prediction using different genomic selection models. The results showed that the NeuralNet model had the highest prediction accuracy and better prospects for predicting shrimp growth traits.
Article
Fisheries
Alberto Ruiz, Ignasi Sanahuja, Karl B. Andree, Dolors Furones, Paul G. Holhorea, Josep A. Calduch-Giner, Jose J. Pastor, Marc Vinas, Jaume Perez-Sanchez, Sofia Morais, Enric Gisbert
Summary: Supplementing diets with a combination of spice oleoresins can reduce lipid accumulation and inflammation in farmed fish. The combination of spice oleoresins also has an immunomodulatory effect on the fish's intestinal immune system, potentially offering anti-inflammatory benefits.
Article
Fisheries
Beibei Zhao, Renhui Mei, Le Li, Di Hu, Lei Li
Summary: This study reveals that JfCXCL8_L1a and JfCXCL8_L1b have different immune pathways, and JfCXCL8_L1b plays a significant role in enhancing the adaptive immunity of T cell-dependent antigen.
Article
Fisheries
Yuhang Liu, Danying Cao, Nan Wu, Xuyang Zhao, Qingsong Zhu, Lian Su, Fatima Altaf, Qianqian Zhang, Haokun Liu, Yongming Li, Bruno Hamish Unger, Yingyin Cheng, Wanting Zhang, Aihua Li, Yaping Wang, Xiao-Qin Xia
Summary: Based on previous research, sinomenine has been found to protect mucosal immunity in farmed fish species by preventing intestinal pathological changes and regulating gene expression related to inflammation. It also enhances immune homeostasis and controls the growth of pathogenic bacteria.