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The Influence of Significant Public Health Events on Offline Consumption and Its Pathways

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JOURNAL OF SYSTEMS SCIENCE AND SYSTEMS ENGINEERING 2024年第5期33卷 627-648页

作者： Lu, Baile zhou, Kewei Hao, Shuai Ta, La Dai, Hongyan zhou, weihua Natl Univ Def Technol Coll Syst Engn Changsha 410073 Peoples R China Cent Univ Finance & Econ Business Sch Beijing 100081 Peoples R China Southern Univ Sci & Technol Coll Business Dept Mkt & Operat Management Shenzhen 518055 Peoples R China Zhejiang Univ Sch Management Hangzhou 310058 Peoples R China

In the face of a significant public health event, consumers may either increase their panic buying or decrease their willingness to make purchases. This study focuses on the impact of a significant public health event on offline store sales and consumer consumption, utilizing data from chain convenience stores in Hefei and Wuhu during early 2019 and early 2020 in China. Employing a difference-in-differences model, the study investigates the effect of the significant public health event outbreak on weekly store sales, order numbers, and consumer consumption in terms of product quantities, transaction amount, average amount per order, and transaction frequency. Different from prior literature that finds hoarding behavior of consumers online, the findings of this paper indicate a significant reduction in stores' offline weekly sales and order numbers, as well as consumers' offline weekly consumption across the four dimensions, as a result of the significant public health event outbreak. Additionally, employing a mediation model, the study explores the pathway of population mobility through which the significant public health event adversely affects offline consumption. Furthermore, subset analysis is conducted for stores located in different areas and consumers with varying characteristics, revealing that the aforementioned conclusions predominantly apply to stores situated in office areas and residential areas, as well as consumers with either no apparent preference for different product categories or a noticeable preference for food.

关键词： Significant public health event offline consumption population mobility mediating effect HUMAN MOBILITY IMPACT

2023—2024年中国图书出版业发展报告

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出版发行研究 2024年第7期 16-23,51页

作者：周蔚华程丽中国人民大学新闻与社会发展研究中心中国人民大学新闻学院

2023年,图书出版业在新冠疫情防控转段后发展向好,图书零售市场码洋恢复增长态势。这一年,图书出版业进行了“出版+人工智能”探索,同时抓住疫情防控转段后的新机遇,加强国际出版交流与合作,并积极探索自播和无人值守直播等直播新模式... 详细信息

2023年,图书出版业在新冠疫情防控转段后发展向好,图书零售市场码洋恢复增长态势。这一年,图书出版业进行了“出版+人工智能”探索,同时抓住疫情防控转段后的新机遇,加强国际出版交流与合作,并积极探索自播和无人值守直播等直播新模式。图书出版业在主题出版、大型出版工程、教育出版、专业与学术出版以及大众出版等板块有诸多亮点,但也存在大中专教材盗版问题严重、古籍整理和出版乱象丛生、人工智能应用于出版业面临风险和挑战等问题,需要改进和完善。文章还对2024年的发展趋势作出预测和研判。

关键词：图书出版行业报告人工智能古籍出版盗版教材

研发费用加计扣除政策对企业数字创新的影响研究

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财政研究 2024年第5期 115-128,F0003页

作者：周卫华潘简权旺中国财政科学研究院中国财政科学研究院研究生院

本文基于研发费用加计扣除政策的实施和2016—2022年上市公司披露的享受研发费用加计扣除政策减免所得税数据,实证检验研发费用加计扣除政策对企业数字创新的影响。研究发现,研发费用加计扣除政策的实施能够显著推动企业数字创新。机制... 详细信息

本文基于研发费用加计扣除政策的实施和2016—2022年上市公司披露的享受研发费用加计扣除政策减免所得税数据,实证检验研发费用加计扣除政策对企业数字创新的影响。研究发现,研发费用加计扣除政策的实施能够显著推动企业数字创新。机制检验发现,研发费用加计扣除政策通过激励管理层制定数字战略和提高研发强度促进企业数字创新。进一步研究发现,研发费用加计扣除政策推动数字创新的边际效率呈现先上升后回落的趋势,而实行税收“放管服”改革、提升地区数字经济水平、优化公平竞争环境均对研发费用加计扣除政策与企业数字创新关系具有显著正向调节效应。为此,本文提出进一步落实研发费用加计扣除政策相关策略、加快推动企业数字化转型和引导企业加大数字研发投入、优化企业数字创新营商环境等政策建议。

关键词：数字创新研发费用加计扣除政策营商环境

贸易信用中账期对供应链上下游及供应链绩效的影响研究

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管理工程学报 2024年第5期38卷 140-152页

作者：周伟华林甜甜胡雨林代宏砚浙江大学管理学院浙江杭州310058 中央财经大学商学院北京100081

贸易信用是供应链中上游企业允许下游企业延期支付的供应链内部融资方式。有观点认为供应链下游企业会通过延长账期挤占上游企业的利益,特别是一些处于优势地位的下游,他们不仅延长账期,同时还向上游提供供应链金融服务。针对这一观点,... 详细信息

贸易信用是供应链中上游企业允许下游企业延期支付的供应链内部融资方式。有观点认为供应链下游企业会通过延长账期挤占上游企业的利益,特别是一些处于优势地位的下游,他们不仅延长账期,同时还向上游提供供应链金融服务。针对这一观点,本文构建了含有一个供应商和一个零售商的供应链模型,对比分析了三种供应商资金模式下(自有资金充足、自有资金不足通过银行融资和自有资金不足通过零售商融资)账期对供应链上下游和供应链绩效的具体影响。研究发现:(1)对于供应商和供应链绩效,账期并非越短越好,对于零售商,账期并非越长越好;(2)当供应商资金不足时,相比银行融资,零售商融资会导致账期延长,但这有利于供应链各成员的利润;(3)账期和零售商融资并存有可能让供应链各成员获得更多利润,甚至会比供应商资金充足情况更优。本文的研究有助于厘清贸易信用中账期对供应链成员的收益以及供应链整体绩效的影响,从而有利于供应链金融业务的健康开展。

关键词：贸易信用账期供应链金融博弈论

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改性煤矸石吸附剂的制备及其吸附性能

黑龙江科技大学学报 2024年第3期34卷 367-373页

作者：康华周维华黑龙江科技大学矿业工程学院哈尔滨150022

为制备高效环保且低成本的吸附剂,以煤矸石为原料,以亚甲基蓝溶液为模拟污染物,通过四因素三水平正交实验确定制备改性煤矸石的最佳条件,并对吸附剂进行XRD、SEM和FTIR表征,探究了改性煤矸石投加量、溶液初始浓度、吸附温度、吸附时间... 详细信息

为制备高效环保且低成本的吸附剂,以煤矸石为原料,以亚甲基蓝溶液为模拟污染物,通过四因素三水平正交实验确定制备改性煤矸石的最佳条件,并对吸附剂进行XRD、SEM和FTIR表征,探究了改性煤矸石投加量、溶液初始浓度、吸附温度、吸附时间、溶液pH值对吸附效果的影响。结果表明:改性煤矸石制备的最佳条件为硫酸镁与煤矸石的质量比为1∶0.5,改性温度为550℃,改性时间为3 h;当改性煤矸石投加量为3 g/L,吸附时间为1.5 h,亚甲基蓝溶液初始浓度为40 mg/L,吸附温度为50℃,溶液的pH值为10时,改性煤矸石的吸附性能最佳,同时Langmuir模型可以更好地描述吸附过程中的吸附等温线。

关键词：煤矸石改性吸附

OUTSOURCING DECISION AND ORDER POLICY WITH FORECAST UPDATING UNDER CAPACITY RESERVATION CONTRACT

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Journal of Systems Science and Systems Engineering 2014年第1期23卷 39-79页

作者： Jianbin LI Mingzheng WANG Wei zhou weihua zhou School of Management Huazhong University of Science and Technology School of Management Science and Engineering Dalian University of Technology School of Management Zhejiang University

This paper investigates an optimal decision problem in a single-period, two-stage supply chain with capacity reservation contract. At the beginning of the planning horizon, the retailer, who faces stochastic demand, reserves future capacity according to his forecasting of the demand. The supplier then constructs capacity. At the beginning of the selling season, the retailer updates the demand forecasting and places an order. When the retailer＇s demand is greater than the supplier＇s capacity, the supplier can meet the retailer＇s demand by outsourcing. We analyze the optimal decision of each player in both centralized and decentralized systems. Furthermore, under the case in which demand follows a uniform distribution, we obtain the closed-form optimal strategies of each player for both centralized and decentralized systems and conduct numerical studies to reveal additional conclusions. The numerical studies show that the optimal reservation capacity for the retailer and the optimal constructing capacity for the supplier in the decentralized system are both less than the optimal constructing capacity in the centralized system. Furthermore, we also find that the profit loss due to decentralization always exists and increases in indeterminacy.

关键词： Supply chain coordination forecast updating reserving contract outsourcing

Trade Credit and Buyer Financing

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Journal of Systems Science and Systems Engineering 2022年第3期31卷 288-312页

作者： weihua zhou Yulin Hu Tiantian Lin Zhigang Ding School of Management Zhejiang UniversityHangzhou 310058China Cardinal Operations Shanghai 200433China Business School Shaoxing UniversityShaoxing 312000China

This study investigates trade credit and early payment financing in a three-party supply chain consisting of a manufacturer,a capital-constrained distributor,and a retail *** manufacturer or the platform provides the financing service to the *** different leadership structures are investigated,namely,platform and manufacturer leadership Stackelberg game,where the platform or manufacturer first makes the decision,*** trade credit financing,the manufacturer and the whole supply chain face loss when the commission rate ***,under buyer financing,they benefit from the high commission *** platform leadership,the distributor,the manufacturer,and the supply chain perform better with trade credit if and only if the commission rate is small or the production cost is high,while the platform always prefers buyer *** manufacturer leadership,the distributor,manufacturer,and supply chain perform better with trade credit under low production cost and commission *** platform prefers trade credit when production cost is in the intermediate *** further analyzing the case that both financing channels are available and the distributor decides which one to choose,we find that the financing services competition hurts only the platform's *** under certain conditions,trade credit and early payment can achieve the same performance for every supply chain *** findings enhance our understanding of the supply chain risk allocation efficiency of trade credit and early payment financing under different leadership *** risk allocation form outperforms the other,and the relative efficiency depends on supply chain characteristics.

关键词： Supply chain finance supply chain risk allocation payment term game theory

Coping with the Bullwhip Effect Using Inventory or Cash: An Environment-Behavior-Performance Paradigm

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Journal of Systems Science and Systems Engineering 2021年第2期30卷 215-235页

作者： Baile Lu Qihui Gong Baofeng Huo weihua zhou School of Management Zhejiang UniversityHangzhou 310058China

The bullwhip effect is w idely found in business and exerts adverse effects on business *** investigate the influence of the bullwhip effect on firm s'performance and their responses,this study proposed an environment-behavior-performance analysis fram ework and offered a new perspective for studying the bullwhip *** data collected from 1,734 listed manufacturers in China from 2002 to 2017,we adopted regression models to test the proposed m odel and conducted a series of robustness *** find that the bullwhip effect is positively related to operating risk,inventory,and cash holdings,and the moderate levels of inventory and cash are negatively associated with operating ***,inventory and cash play different roles and work together to alleviate operating risk induced by the bullwhip ***,excess resource holdings are positively associated with operating ***,firm swith different levels of resources should hold suitable levels of inventory,cash,or both as contingent responses to the bullwhip effect.

关键词： Bullwhip effect inventory holding cash holding operating risk

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2023年中国出版融合发展报告

数字出版研究 2024年第1期3卷 68-77页

作者：陈丹丹周蔚华工人日报社国内新闻部北京100120 中国人民大学新闻学院北京100872 《新闻春秋》编辑部北京100872

2023年,在中央顶层设计推动和出版学界业界的共同努力下,出版融合发展驶入快车道,国内经济持续回升向好,为出版融合拓展了更为广阔的空间。2023年出版融合在理论、政策和实践三个方面均取得新的进展。理论研究层面,中国出版融合研究成... 详细信息

2023年,在中央顶层设计推动和出版学界业界的共同努力下,出版融合发展驶入快车道,国内经济持续回升向好,为出版融合拓展了更为广阔的空间。2023年出版融合在理论、政策和实践三个方面均取得新的进展。理论研究层面,中国出版融合研究成果数量较2022年略有下降,但总体仍呈上升趋势,研究热点相对丰富;宏观政策层面,重点关注管理部门顶层设计等重点部署、高水平专业人才培养、数字版权保护与监管、网络空间治理四个重点;产业实践层面,集中于产品形态创新、技术赋能出版全链路、传播场景与商业模式持续拓展、网文“出海”进入新阶段四个方面。此外,本文针对2023年“出版融合”在理论、政策和实践方面存在的一些问题提出了对应建议,致力推动出版融合可持续发展。

关键词：出版融合发展出版业人工智能发展报告