Journal of Management Science and Engineering最新文献_第3页

Cholesky GAS models for large time-varying covariance matrices 大型时变协方差矩阵的 Cholesky GAS 模型

IF 6.6 2区管理学

Journal of Management Science and Engineering Pub Date : 2023-12-01 DOI: 10.1016/j.jmse.2023.10.003

Tingguo Zheng, Shiqin Ye

引用次数: 0

Understanding how heterogeneous agents affect Principal's returns: Perspectives from short-termism and Bayesian learning 理解异质代理人如何影响委托人的回报:来自短期主义和贝叶斯学习的视角

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-03-13 DOI: 10.1016/j.jmse.2022.12.004

Chuan Ding , Yang Li , Zhenyu Cui

引用次数: 1

Video-based pedestrian grouping model considering long-span space in a big hall 考虑大厅大跨度空间的视频行人分组模型

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-04-03 DOI: 10.1016/j.jmse.2022.12.005

Rongyong Zhao, Yan Wang, Ping Jia, Cuiling Li, Daheng Dong, Yunlong Ma

{"title":"Video-based pedestrian grouping model considering long-span space in a big hall","authors":"Rongyong Zhao, Yan Wang, Ping Jia, Cuiling Li, Daheng Dong, Yunlong Ma","doi":"10.1016/j.jmse.2022.12.005","DOIUrl":"10.1016/j.jmse.2022.12.005","url":null,"abstract":"<div><p>Pedestrian group detection is a challenging but significant issue in pedestrian flow control and public safety management. To address the issue that most conventional pedestrian grouping models (PGMs) can only identify a pedestrian group at a limited distance of less than 2 m, this study extended the pedestrian distance constraint of conventional PGMs with a reconstruction of the normal group detection criterion and development of a novel group detection criterion suitable for long-span space. To measure the movement behavior similarity with normal distance, five necessary constraints: velocity difference, moving direction offset, distance limitation, distance fluctuation, and group-keeping duration were studied quantitatively to form the criterion to detect normal groups. Meanwhile, a long-span group detection criterion was proposed with extended distance and direction consistency constraints. Therefore, this study proposed an improved PGM that considers long-span spaces (PGMLS). In the PGMLS workflow, the MMTrack algorithm was used to obtain pedestrian trajectories. A difference measurement method based on sequential pattern analysis (SPA) was adopted to analyze the velocity similarity of pedestrians. To validate the proposed grouping model, experiments based on pedestrian movement videos in the exit hall of the Shanghai Hongqiao International Airport were conducted. The results indicate that the proposed model can detect both normal and widely separated pedestrian groups, with a long span range of 2–12 m.</p></div>","PeriodicalId":36172,"journal":{"name":"Journal of Management Science and Engineering","volume":"8 3","pages":"Pages 398-412"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43092744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Market reactions to trade friction between China and the United States: Evidence from the soybean futures market 市场对中美贸易摩擦的反应——来自大豆期货市场的证据

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-03-03 DOI: 10.1016/j.jmse.2022.12.002

Tian Wen , Ping Li , Lei Chen , Yunbi An

{"title":"Market reactions to trade friction between China and the United States: Evidence from the soybean futures market","authors":"Tian Wen , Ping Li , Lei Chen , Yunbi An","doi":"10.1016/j.jmse.2022.12.002","DOIUrl":"10.1016/j.jmse.2022.12.002","url":null,"abstract":"<div><p>In March 2018, the US used an immense trade deficit as an excuse to provoke trade friction with China. This study uses the EGARCH model and event study methods to study the impact of the major risk event of Sino-US trade friction on soybean futures markets in China and the United States. Results indicate that the Sino-US trade friction weakened the return spillover effect between the soybean futures markets in China and the US, and significantly increased market volatilities. As the scale of additional tariffs increased, the volatility of the Chinese soybean futures market declined; however, the volatility of the US soybean futures market did not weaken. In addition, expanding the sources of soybean imports helped ease the impact of tariffs on China’s soybean futures market, while the decline in US soybean exports to China intensified the volatility of the US soybean futures market. In addition, while the release of multiple tariff increases has had a short-term impact on the returns of soybean futures markets, the impact of trade friction has gradually decreased.</p></div>","PeriodicalId":36172,"journal":{"name":"Journal of Management Science and Engineering","volume":"8 3","pages":"Pages 325-341"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46108916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Credit ratings of Chinese online loan platforms based on factor scores and K-means clustering algorithm 基于因子得分和K-means聚类算法的中国网络贷款平台信用评级

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-03-04 DOI: 10.1016/j.jmse.2022.12.003

Rongda Chen , Shengnan Wang , Zhenghao Zhu , Jingjing Yu , Chao Dang

{"title":"Credit ratings of Chinese online loan platforms based on factor scores and K-means clustering algorithm","authors":"Rongda Chen , Shengnan Wang , Zhenghao Zhu , Jingjing Yu , Chao Dang","doi":"10.1016/j.jmse.2022.12.003","DOIUrl":"10.1016/j.jmse.2022.12.003","url":null,"abstract":"<div><p>The rapid development of Chinese online loan platforms (OLPs), as well as their risks, has attracted widespread attention, increasing the demand for a complete credit rating mechanism. The present study establishes a credit rating indicator system for 130 mainstream Chinese OLPs that combines 12 quantitative metrics of online loan operations similar to commercial bank credit rating indicators, including platform transaction volume and average expected rate of return. We also consider two qualitative indicators of online loan background, namely platform background and guarantee mode, that reflect Chinese characteristics. Subsequently, a factor analysis was conducted to reduce the 14 indicators’ dimensions. The loads of the rating indicators in the resulting rotating component matrix were refined into an OLP operation scale factor, fund dispersion factor, security factor, and profitability factor. Finally, a K-means clustering algorithm was employed to cluster the factor scores of each OLP, thereby obtaining credit rating results. The empirical results indicate that the proposed machine learning–based credit rating method effectively provides early warnings of problem platforms, yielding more accurate credit ratings than those provided by two mainstream online loan rating websites in China, namely, Wangdaitianyan and Wangdaizhijia.</p></div>","PeriodicalId":36172,"journal":{"name":"Journal of Management Science and Engineering","volume":"8 3","pages":"Pages 287-304"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42679138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Does political propaganda matter in mitigating climate change? Insights from the United States of America 政治宣传在缓解气候变化方面重要吗？美利坚合众国的见解

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-04-07 DOI: 10.1016/j.jmse.2022.12.006

Hermas Abudu , Presley K. Wesseh Jr. , Boqiang Lin

{"title":"Does political propaganda matter in mitigating climate change? Insights from the United States of America","authors":"Hermas Abudu , Presley K. Wesseh Jr. , Boqiang Lin","doi":"10.1016/j.jmse.2022.12.006","DOIUrl":"https://doi.org/10.1016/j.jmse.2022.12.006","url":null,"abstract":"<div><p>Some research on climate change has been the basis of climate change denialism (hereafter, CCD is used to refer to denial, denialism, and deniers). There is formative knowledge about the role of political propaganda in climate policies and resulting outcomes. To contribute to the understanding of political ideology and the extent of CCD, we adopt econometric techniques to study the impact of the United States of America's withdrawal from the Paris Agreement. The results show that ideological political propaganda has psychological and philosophical consequences that impact climate change policies. In addition, we find that the effect of a state's economic growth on climate change is mediated by CCD. In particular, low-income capitalist states have a higher propensity to become CCDs because they are more likely to engage in economic expansion even at the expense of environmental sustainability. Global climate change policies depend on high-income nations and industries' willingness to adopt economic policies to achieve sustainable future development. Thus, this study fills the literature gap on the relationship between political ideology and climate change. The findings show that CCD significantly influences voting patterns and socioeconomic outcomes. It impedes states from achieving net-zero emissions and carbon neutrality and it is used as a political propaganda. Subject to these findings, relevant policy suggestions are offered.</p></div>","PeriodicalId":36172,"journal":{"name":"Journal of Management Science and Engineering","volume":"8 3","pages":"Pages 386-397"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49798880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Joint inventory and transshipment decisions with consumer behavioral heterogeneity 具有消费者行为异质性的联合库存和转运决策

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-04-07 DOI: 10.1016/j.jmse.2022.12.007

Pingping Feng , Jian Chai , Zhongquan Hu , Wei Zong , Feng Wu , Devin J. Wang

{"title":"Joint inventory and transshipment decisions with consumer behavioral heterogeneity","authors":"Pingping Feng , Jian Chai , Zhongquan Hu , Wei Zong , Feng Wu , Devin J. Wang","doi":"10.1016/j.jmse.2022.12.007","DOIUrl":"https://doi.org/10.1016/j.jmse.2022.12.007","url":null,"abstract":"<div><p>Transshipment is an effective method for reducing mismatches between supply and demand among retailers. Consumers attempting to purchase out-of-stock items may wait for transshipment, purchase at another store, or choose not to buy. In this paper, the consumer behavioral heterogeneity is characterized using the transshipment request rate and consumer switching rate. It affects the replenishment and transshipment decisions, as well as the system profits. The inventory replenishment and transshipment decisions are studied in both centralized and decentralized two-location inventory systems with consumer behavioral heterogeneity. We characterize optimal replenishment decisions in a centralized system, prove the existence of a unique Nash equilibrium in a decentralized system with a specific demand distribution, and determine the coordinating transshipment price for some decentralized systems. In numerical studies, the performance of various systems is analyzed for consumers with identical (symmetric) or differing (asymmetric) behavior between retailers. For scenarios with symmetric consumers, a higher transshipment request rate and consumer switching rate resulted in increased total profit in all systems. For scenarios with asymmetric consumers, the retailer with the higher consumer switching rate should reduce ordering in a centralized system but increase ordering in a decentralized system. Moreover, the retailer with the higher transshipment request rate reduces ordering to increase profit, whereas the other retailer increases order quantity yet earns less profit.</p></div>","PeriodicalId":36172,"journal":{"name":"Journal of Management Science and Engineering","volume":"8 3","pages":"Pages 369-385"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49798879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digital Influencer's choice of product endorsement: A perspective of congruence 数字影响力者对产品背书的选择：一致性视角

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-09-01 Epub Date: 2023-03-26 DOI: 10.1016/j.jmse.2023.01.001

Nan Feng , Wenfan Zhao , Haiyang Feng , Minqiang Li , Liang Xian

{"title":"Digital Influencer's choice of product endorsement: A perspective of congruence","authors":"Nan Feng , Wenfan Zhao , Haiyang Feng , Minqiang Li , Liang Xian","doi":"10.1016/j.jmse.2023.01.001","DOIUrl":"10.1016/j.jmse.2023.01.001","url":null,"abstract":"<div><p>To infer product fitness information, consumers often consult digital influencers who exert effort to learn and evaluate product features and then propagate information to their followers. However, influencers' recommendations are not limited to products that exactly match their expertise, which may lead followers to unfollow them. This study investigates which product (high or low congruence) an influencer should endorse and how much endorsement effort should be exerted. Using a theoretical model, we obtain several interesting results. First, endorsing a low-congruence product can surprisingly benefit the influencer if the penalty per lost follower is moderate or if the influencer has sufficiently high efficiency in reducing the perception error of this product. Second, although the influencer has high expertise in the high-congruence product, she will lose more followers when endorsing it than when endorsing the low-congruence product if a particularly small or large proportion of her followers are potential consumers of the low-congruence product. Third, when the influencer endorses the low-congruence product, the number of new followers increases with the size of the influencer's follower base only when the follower base is small and a large proportion of followers are potential consumers of the low-congruence product. Interestingly, as the size of the follower base increases, the influencer always exerts more effort when endorsing the high-congruence product but will exert less effort in learning about the low-congruence product if a sufficiently small proportion of followers are potential consumers. Finally, after taking consumers' knowledge about product features into account, the main results still hold, and when considering the competition between influencers, we uncover the conditions under which both influencers will choose to endorse the high-congruence product.</p></div>","PeriodicalId":36172,"journal":{"name":"Journal of Management Science and Engineering","volume":"8 3","pages":"Pages 305-324"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43598494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Realized volatility forecast of financial futures using time-varying HAR latent factor models 利用时变HAR潜因子模型实现金融期货波动性预测

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-06-01 Epub Date: 2022-12-22 DOI: 10.1016/j.jmse.2022.10.005

Jiawen Luo , Zhenbiao Chen , Shengquan Wang

引用次数: 3

Changes in firm profitability, heterogeneous investor beliefs, and stock returns 公司盈利能力、异质投资者信念和股票回报的变化

2区管理学

Journal of Management Science and Engineering Pub Date : 2023-06-01 Epub Date: 2022-11-26 DOI: 10.1016/j.jmse.2022.10.004

Yifang Liu, Baochen Yang, Yunpeng Su

引用次数: 0