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Analyzing convergence across African economies while allowing for measurement errors 分析非洲各经济体的趋同,同时考虑到测量误差
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2026-01-10 DOI: 10.1016/j.seps.2026.102415
Raffaele Mattera , Philip Hans Franses
We propose a new spatio-temporal hierarchical clustering approach that is suitable for clustering African countries based on Gross Domestic Product under measurement error. To accommodate for measurement error, we use slave trade as an instrument. Furthermore, we extend our method to allow for a range of macroeconomic indicators, instead of just GDP. We document that our findings largely agree on the degree of convergence.
本文提出了一种新的时空分层聚类方法,该方法适用于测量误差下基于国内生产总值的非洲国家聚类。为了适应测量误差,我们使用奴隶贸易作为一种工具。此外,我们扩展了我们的方法,以考虑一系列宏观经济指标,而不仅仅是GDP。我们证明,我们的研究结果在趋同程度上基本一致。
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引用次数: 0
Does artificial intelligence promote disruptive innovation in SRDI enterprises: Evidence from LLM-based text analysis 人工智能是否促进了SRDI企业的颠覆性创新:来自法学硕士文本分析的证据
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2026-01-05 DOI: 10.1016/j.seps.2026.102416
Xu Zhang , Zhongmin Yan , Abdul Rauf
In the wave of digital transformation, whether artificial intelligence (AI) can drive disruptive innovation in small and medium-sized enterprises (SMEs) has become an important research question. Using data on China's “Specialized, Refined, Distinctive, and Innovative” (SRDI) enterprises from 2014 to 2024, this paper measures the penetration level of AI in enterprises based on large language models (LLMs) text analysis methods, and constructs a large-scale patent text corpus to derive a disruptive innovation index. Results show that the AI adoption significantly enhances the disruptive innovation level of SRDI enterprises, and the conclusion still holds true after robustness tests. Mechanism analysis reveals that AI promotes disruptive innovation by optimizing human capital structures, increasing R&D investment, and facilitating access to policy support. The positive effect of AI on disruptive innovation is stronger for enterprises in eastern regions and high-technology sectors. This study deepens understanding of how AI drives disruptive innovation and provides implications for intelligent manufacturing development.
在数字化转型的浪潮中,人工智能(AI)能否推动中小企业的颠覆性创新成为一个重要的研究问题。本文利用2014 - 2024年中国“专、精、特、创”(SRDI)企业数据,基于大语言模型(llm)文本分析方法测度人工智能在企业中的渗透水平,构建大规模专利文本语料库,推导出颠覆性创新指数。结果表明,采用人工智能显著提高了自主创新企业的颠覆性创新水平,经稳健性检验,结论仍然成立。机制分析表明,人工智能通过优化人力资本结构、增加研发投入和便利获得政策支持来促进颠覆性创新。人工智能对颠覆性创新的积极作用在东部地区和高技术领域的企业中更为明显。这项研究加深了对人工智能如何推动颠覆性创新的理解,并为智能制造的发展提供了启示。
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引用次数: 0
Marine organizational collaborative network: Enhancing technological innovation for environmental monitoring 海洋组织协同网络:加强环境监测技术创新
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2026-01-04 DOI: 10.1016/j.seps.2025.102413
Yanmei Wang , Enhui Sun , Wenying Yan
As climate change intensifies and ocean resource exploitation continues, the marine environment has gained increasing societal attention. Marine environmental monitoring technologies are crucial for ocean conservation. Collaborative innovation among interdisciplinary organizations is pivotal to technological advancement. However, the mechanisms underlying marine organizational collaborative innovation remain underexplored. This study constructs a collaborative innovation network using Chinese joint patent application data related to marine environmental monitoring buoy technologies. By employing visualization tools, we trace the evolutionary paths of the network and apply the Temporal Exponential Random Graph Model (TERGM) to examine the relationships between key factors and the network's formation and evolution. The findings underscore the roles of endogenous structures, node attributes, external conditions, and time dependence on network formation and evolution. The study also reveals the growing tendency for organizations to collaborate with those possessing similar technological knowledge structures. Identifying these key factors enables environmental advocates and policymakers to tailor strategies effectively in support of marine sustainable development.
随着气候变化的加剧和海洋资源开发的不断进行,海洋环境越来越受到社会的关注。海洋环境监测技术对海洋保护至关重要。跨学科组织之间的协同创新是技术进步的关键。然而,海洋组织协同创新的机制尚未得到充分探讨。本研究利用中国海洋环境监测浮标技术联合专利申请数据构建协同创新网络。通过可视化工具,我们追踪了网络的演化路径,并应用时间指数随机图模型(TERGM)来研究关键因素与网络形成和演化之间的关系。研究结果强调了内部结构、节点属性、外部条件和时间依赖性对网络形成和演化的作用。该研究还揭示了组织与拥有相似技术知识结构的组织合作的增长趋势。确定这些关键因素使环境倡导者和决策者能够有效地制定战略,以支持海洋可持续发展。
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引用次数: 0
Operational performance of urban real estate in China: An additive network DEA model 中国城市房地产经营绩效:一个加法网络DEA模型
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2026-01-02 DOI: 10.1016/j.seps.2025.102414
Hao Zhang , Wattanaporn Nalinrat , Rong Xiang , Anyu Yu , Yue Gao
The real estate industry encompasses sequential sub-processes in operations, including land acquisition, house construction, and house sales and rentals. Investigating the sub-process structure of real estate operations is essential to demystifying and improving the overall operational performance. This study proposes an additive network DEA model to estimate the process-oriented performance of urban real estate operations and capture hidden sub-process performance. The sequential linear programming method is used to address the model's nonlinearity. We further explore the impact of operational performance on housing prices to identify the main underlying driver of China's booming real estate market. The proposed model is applied to assess the operational performance of Chinese urban real estate markets over the past decade. The empirical findings reveal that: (1) performance losses may stem from weaknesses in the housing construction process, with significant improvement potential in overall operational and sub-process performance in most cities. (2) Enhanced performance in the construction process can fuel short-term housing prices increases during market booms. (3) Higher real estate operational performance may initially raise housing prices but ultimately inhibit them in the long term due to limited market demand. Our proposed method framework proves to be an effective tool for policymakers to design wise operational plans for improving real estate operational performance.
房地产行业包括连续的子流程的操作,包括土地收购,房屋建设,房屋销售和租赁。研究房地产经营的子流程结构,对揭示和提高整体经营绩效具有重要意义。本文提出了一种可加性网络DEA模型来估计城市房地产经营的过程导向绩效,并捕捉隐藏的子过程绩效。采用顺序线性规划方法解决了模型的非线性问题。我们进一步探讨了经营绩效对房价的影响,以确定中国蓬勃发展的房地产市场的主要潜在驱动因素。运用该模型对近十年来中国城市房地产市场的运行绩效进行了评估。实证结果表明:(1)绩效损失可能源于住房建设过程中的薄弱环节,大多数城市的总体运营绩效和子流程绩效都有显著的提升潜力。(2)在市场繁荣时期,建设过程中性能的提高会推动房价的短期上涨。(3)较高的房地产经营绩效可能会在初期提高房价,但由于市场需求有限,最终在长期抑制房价。我们提出的方法框架被证明是决策者设计明智的运营计划以提高房地产运营绩效的有效工具。
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引用次数: 0
Measuring national sustainability: ESG scores from corporate data 衡量国家可持续性:ESG评分来自企业数据
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2025-12-29 DOI: 10.1016/j.seps.2025.102408
Sergio Hoffmann , Rita Laura D’Ecclesia
Environmental, Social, and Governance (ESG) metrics have become central to sustainability assessment, yet the link between national conditions and composite ESG performance remains largely unexplored. We develop a bottom-up national ESG rating by aggregating the distribution of listed firms’ ESG scores for twelve developed economies between 2013 and 2022. Several aggregation schemes—mean, median, Sen’s inequality-adjusted index, and a dispersion-adjusted mean—are benchmarked, and the resulting rankings prove highly consistent, supporting the median as the headline measure. National ratings are then compared with World Bank indicators of environmental efficiency, social welfare, and governance quality through panel fixed-effects regressions and four machine-learning models (Random Forest, Gradient Boosting, Support Vector Regression, and CatBoost), assessed via cross-validation and explainability tools. CatBoost achieves the highest predictive accuracy and balanced use of predictors. Energy intensity and under-five mortality consistently act as dominant negative drivers, while gender representation and demographic maturity contribute positively. A pillar-level (E, S, G) panel-VAR analysis reveals strong within-pillar persistence and asymmetric cross-effects led by the social dimension. Overall, the framework provides a transparent bridge from firm-level data to national ESG performance, delivering robust and interpretable evidence for policy evaluation and sustainable investment screening.
环境、社会和治理(ESG)指标已成为可持续发展评估的核心,但国情与综合ESG绩效之间的联系在很大程度上仍未得到探索。我们通过汇总2013年至2022年12个发达经济体上市公司的ESG得分分布,开发了一个自下而上的国家ESG评级。几个汇总方案——平均、中位数、森的不平等调整指数和分散调整的平均值——被作为基准,结果证明排名高度一致,支持中位数作为主要衡量标准。然后,通过面板固定效应回归和四种机器学习模型(随机森林、梯度增强、支持向量回归和CatBoost),将国家评级与世界银行的环境效率、社会福利和治理质量指标进行比较,并通过交叉验证和可解释性工具进行评估。CatBoost实现了最高的预测精度和预测器的平衡使用。能源强度和五岁以下儿童死亡率一直是主要的消极驱动因素,而性别代表性和人口成熟度则起到积极作用。支柱水平(E, S, G)面板var分析揭示了强大的支柱内持久性和由社会维度导致的不对称交叉效应。总体而言,该框架提供了从企业层面数据到国家ESG绩效的透明桥梁,为政策评估和可持续投资筛选提供了可靠且可解释的证据。
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引用次数: 0
Labor endowment, productive services and farmers' adoption of ecological agriculture: Taking rice-crayfish co-culture model as an example 劳动力禀赋、生产服务与农民生态农业的采用——以稻小龙虾共生模式为例
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2025-12-28 DOI: 10.1016/j.seps.2025.102412
Xingjie Yang , Yihang Hu , Huseyin Caliskan , Zhenhong Qi , Qiang Liu
Despite growing emphasis on ecological agriculture, limited attention has been examined how labor endowment and productive services to shape farmers' adoption decisions. This study investigates the synergistic role of labor endowment and productive services in adopting the rice-crayfish co-culture model, using 2023 survey data from small-scale farmers in the middle and lower reaches of the Yangtze River. The results show that labor endowment is a key driver of adoption. Both labor quantity and labor quality increase the likelihood of adoption, by 17.5 % and 3.1 % per additional unit, respectively. Productive services further strengthen these effects. Seedling provision and agricultural supply services mainly amplify the effect of labor quality endowment, while planting and disease prevention services reinforce the overall influence of labor endowment. Marketing services play a distinctive role in enhancing the contribution of labor quality to adoption behavior. Heterogeneity analysis reveals that the positive impact of labor endowment is considerably stronger among production oriented farmers, new business subjects, large-scale grain growers, and farmers with better cultivated land conditions than among subsistence and small-scale farmers. Mechanism analysis shows that labor endowment promotes adoption mainly by improving farmers' ability to learn and master ecological production technologies. The study advances theoretical understanding by demonstrating that productive services in complex ecological agricultural systems operate under a complementarity logic, rather than functioning as substitutes for household labor. These findings provide new empirical evidence on the multidimensional mechanisms linking labor endowment, service provision, and ecological technology adoption.
尽管生态农业越来越受到重视,但对劳动力禀赋和生产性服务如何影响农民收养决定的研究却很少。本文利用长江中下游地区2023年小农调查数据,考察了劳动力禀赋和生产性服务在水稻-小龙虾共养殖模型中的协同作用。结果表明,劳动力禀赋是采用的关键驱动因素。劳动力数量和劳动力质量都会增加被采用的可能性,每增加一个单位分别增加17.5%和3.1%。生产性服务业进一步加强了这些影响。种苗服务和农业供给服务主要放大劳动力素质禀赋效应,种苗服务和防病服务强化劳动力素质禀赋整体效应。营销服务在提高劳动力素质对收养行为的贡献方面具有显著作用。异质性分析表明,劳动力禀赋对生产型农户、新型经营主体、规模化种粮农户和耕地条件较好的农户的正向影响明显强于自耕农和小农。机制分析表明,劳动力禀赋主要通过提高农民学习和掌握生态生产技术的能力来促进采用。该研究通过证明复杂生态农业系统中的生产性服务是在互补逻辑下运作的,而不是作为家庭劳动的替代品,从而推进了理论理解。这些发现为劳动力禀赋、服务供给与生态技术采用之间的多维机制提供了新的实证证据。
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引用次数: 0
Dynamic evaluation of operational, environmental, and unified efficiencies: A DEA application in agriculture 操作、环境和统一效率的动态评价:DEA在农业中的应用
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2025-12-27 DOI: 10.1016/j.seps.2025.102411
Zahra Abbasi , Mohammad Afzalinejad , Ali Asghar Foroughi
Data Envelopment Analysis (DEA) is a prominent tool used to assess the efficiency of decision-making units (DMUs). While static DEA models measure performance without considering time dependency, dynamic DEA incorporates time as a factor in the modeling. In recent years, environmental concerns have become a significant focus for the world community. In the context of DEA, these concerns are often expressed as undesirable outputs of the production process. Therefore, in addition to evaluating operational efficiency, it is essential to consider environmental efficiency to obtain a comprehensive measurement of DMUs’ performance. This paper presents the assessment of operational and environmental efficiency and their integration into a unified efficiency measure within the dynamic DEA framework. The time dependency of efficiency is taken into account and the links between consecutive time periods are categorized as either good or bad types. Additionally, static environmental models are established to enable comparison of dynamic and static efficiency. The proposed models are used to evaluate the performance of twenty-one countries in the agriculture sector. In this study, GHG emissions and cumulative agricultural loss due to disasters are selected as undesirable factors. Environmental efficiency generally improves over 2016–2018; however, while the static assessment shows steady progress, the dynamic assessment rises until 2017 and then slightly declines in 2018. The number of efficient countries in the operational dimension is much more than those in the environmental dimension, which shows that the economic dimension has a higher priority among countries.
数据包络分析(DEA)是评估决策单元(dmu)效率的重要工具。静态DEA模型在不考虑时间依赖性的情况下衡量性能,而动态DEA将时间作为建模的一个因素。近年来,环境问题已成为国际社会关注的一个重要焦点。在数据分析的背景下,这些问题通常被表示为生产过程的不良产出。因此,除了评估操作效率外,还必须考虑环境效率,以获得对dmu性能的综合衡量。本文介绍了运营效率和环境效率的评估,并在动态DEA框架内将其整合为统一的效率度量。效率的时间依赖性被考虑在内,连续时间段之间的联系被分类为好或坏类型。此外,还建立了静态环境模型,以实现动态和静态效率的比较。所提出的模型用于评估21个国家农业部门的绩效。本研究选择温室气体排放和灾害造成的累积农业损失作为不良因素。2016-2018年环境效率总体提高;然而,虽然静态评估呈现稳步进展,但动态评估在2017年之前上升,然后在2018年略有下降。在业务方面效率高的国家远远多于在环境方面效率高的国家,这表明经济方面在各国中具有更高的优先地位。
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引用次数: 0
Optimal resource allocation estimation of agricultural sustainable systems based on inverse network DEA 基于逆网络DEA的农业可持续系统资源最优配置估计
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2025-12-24 DOI: 10.1016/j.seps.2025.102410
Jiqiang Zhao , Lijun Cheng , Xianhua Wu
Sustainable agricultural systems are crucial for balancing food security and ecological protection. This study develops a two-stage inverse network data envelopment analysis (DEA) model that incorporates shared inputs and undesirable outputs to evaluate and optimize resource allocation in agricultural production and pollution control. Using data from 31 Chinese provinces (2010–2023), the model estimates optimal resource allocation strategies under constant-efficiency and efficiency-improvement scenarios. Results indicate that although system efficiency is generally improving, notable regional disparities remain. Under constant efficiency, achieving a 5 % output increase requires substantial input growth, particularly in pesticides, whereas efficiency improvement reduces overall inputs by an average of 5.84 %, indicating the role of technological progress in resource conservation. The proposed framework represents a dynamic and practical tool for policymakers to design targeted, forward-looking strategies for sustainable agriculture.
可持续农业系统对于平衡粮食安全和生态保护至关重要。本文建立了一个两阶段的反网络数据包络分析(DEA)模型,该模型将共享投入和不期望产出结合起来,以评估和优化农业生产和污染控制中的资源配置。利用中国31个省份2010-2023年的数据,该模型估计了恒定效率和效率提升情景下的最优资源配置策略。结果表明,虽然系统效率总体上在提高,但区域差异仍然显著。在效率不变的情况下,实现5%的产量增长需要大量的投入增长,特别是在农药方面,而效率的提高平均使总投入减少5.84%,这表明技术进步在资源节约方面的作用。拟议的框架为政策制定者设计有针对性的、前瞻性的可持续农业战略提供了一个动态和实用的工具。
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引用次数: 0
Capturing and representing the multidimensionality of welfare through structural equation modeling and a goal-based composite indicator with multiple constraints 通过结构方程模型和基于目标的多约束复合指标,捕捉和表示福利的多维度
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2025-12-23 DOI: 10.1016/j.seps.2025.102409
Matheus Pereira Libório, Helena Teixeira Magalhães Soares, Caio Cesar Soares Gonçalves, Marcos Flávio Silveira Vasconcelos D'Angelo, Petr Iakovlevitch Ekel
This study examines the concept of multidimensional welfare, which encompasses multiple aspects across various dimensions. The study introduces an approach that combines ranking normalization, structural equation modeling, and a new method for constructing composite indicators. This approach enables improved differentiation of welfare levels, confirming the multidimensional nature of welfare and representing it through a readily understandable unidimensional measure. This innovative approach fills a gap in methodologies by considering the interrelationships between dimensions, avoiding aggregating dimensions that carry little information into the composite indicator, ensuring the composite indicator's multidimensionality, and avoiding making it predominantly explained by a single dimension. Other advantages of this approach include a rigorous explanation of the conceptual framework of multidimensional welfare, avoiding the assignment of equal weights to the dimensions due to the lack of a clear and consistent weighting scheme, and providing transparency in the objective definition of dimension weights. The results indicate that government efforts to provide social services and protection are insufficient to improve welfare levels in the poorest municipalities. Governments should not allocate resources solely to social assistance and protection; instead, they should generate employment and income opportunities and promote digital inclusion, leisure, culture, and sports. In addition to contributing to the welfare literature and informing the formulation of more effective social policies, this study advances the composite indicators literature by offering an innovative weighting scheme that ensures conceptual compatibility and preserves the composite's multidimensionality.
本研究探讨了多维福利的概念,它涵盖了不同维度的多个方面。本文提出了一种结合排序归一化、结构方程建模和构建复合指标的新方法。这种方法能够改进福利水平的区分,确认福利的多维性质,并通过易于理解的单维度量来表示它。这种创新的方法通过考虑维度之间的相互关系,避免将携带很少信息的维度聚合到复合指标中,确保复合指标的多维性,避免主要由单一维度来解释,从而填补了方法上的空白。该方法的其他优点包括对多维福利概念框架的严格解释,避免由于缺乏清晰一致的加权方案而对维度分配相等的权重,并在维度权重的客观定义中提供透明度。结果表明,政府提供社会服务和保护的努力不足以提高最贫穷城市的福利水平。政府不应将资源只分配给社会援助和保护;相反,他们应该创造就业和收入机会,促进数字包容、休闲、文化和体育。除了为福利文献做出贡献并为制定更有效的社会政策提供信息外,本研究还通过提供一种创新的加权方案来推进复合指标文献,该方案确保了概念上的兼容性并保留了复合指标的多维性。
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引用次数: 0
Context-rich data sets for school operations models and methods 上下文丰富的数据集,用于学校运营模型和方法
IF 5.4 2区 经济学 Q1 ECONOMICS Pub Date : 2025-12-08 DOI: 10.1016/j.seps.2025.102406
Aysu Ozel , Karen Smilowitz
In transportation and logistics problems, such as the traveling salesman problem or the vehicle routing problem, the geographic distribution of nodes can significantly impact both the solutions obtained and the performance of solution approaches. Therefore, it is common for researchers to share test instances for meaningful comparisons. In some contexts, this is more challenging when data are protected and cannot be shared. This is particularly true for transportation and logistics problems found in public school operations. Despite growing literature, proposed models and solution approaches are rarely compared across papers because data protection regulations prohibit sharing data. At the same time, randomly generated data can miss critical patterns existing in reality that may impact equitable access to education. In this paper, we introduce a framework to create context-rich data sets for school operations models and methods based on publicly available data that reflect public school district characteristics in the United States.
在交通和物流问题中,如旅行商问题或车辆路线问题,节点的地理分布会显著影响得到的解和求解方法的性能。因此,研究人员共享测试实例以进行有意义的比较是很常见的。在某些上下文中,当数据受到保护且不能共享时,这更具挑战性。在公立学校运营中发现的交通和物流问题尤其如此。尽管文献越来越多,但由于数据保护法规禁止共享数据,因此很少在论文之间比较提出的模型和解决方案方法。与此同时,随机生成的数据可能错过现实中存在的可能影响公平接受教育机会的关键模式。在本文中,我们引入了一个框架,以基于反映美国公立学区特征的公开可用数据为学校运营模型和方法创建上下文丰富的数据集。
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引用次数: 0
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Socio-economic Planning Sciences
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