Impacts of agri-food e-commerce on traditional wholesale industry:Evidence from China

Rapidly expanding studies investigate the effects of e-commerce on company operations in the retail market.However,the interaction between agri-food e-commerce(AEC)and the traditional agri-food wholesale industry(AWI)has not received enough attention in the existing literature.Based on the provincial panel data from 2013 to 2020 in China,this paper examines the effect of AEC on AWI,comprising three dimensions:digitalization(DIGITAL),agrifood e-commerce infrastructure and supporting services(AECI),and agri-food e-commerce economy(AECE).First,AWI and AEC are measured using an entropy-based combination of indicators.The results indicate that for China as a whole,AWI has remained practically unchanged,whereas AEC exhibits a significant rising trend.Second,the findings of the fixed-effect regression reveal that DIGITAL and AECE tend to raise AWI,whereas AECI negatively affects AWI.Third,threshold regression results indicate that AECI tends to diminish AWI with three-stage inhibitory intensity,which manifests as a first increase and then a drop in the inhibition degree.These results suggest that with the introduction of e-commerce for agricultural product circulation,digital development will have catfish effects that tend to stimulate the vitality of the conventional wholesale industry and promote technical progress.Furthermore,the traditional wholesale industry benefits financially from e-commerce even while it diverts part of the traditional wholesale circulation for agricultural products.

The effects of population aging on industrial structure upgrading:Empirical analysis of provincial and threshold characteristics in China

Global population aging trends are intensifying,presenting multifaceted economic and social challenges for countries worldwide.As the world’s largest developing country,China has entered a phase of extreme demographic aging,posing significant questions about its impact on the ongoing upgrading of industrial structures.How does this demographic shift influence the upgrading of industrial structures,and does technological innovation mitigate or exacerbate this impact?The empirical results indicate that population aging impedes upgrading the industrial structure,while technological innovation positively affects the relationship between the two.Moreover,using technological innovation as a threshold variable,the impact of population aging on industrial structure upgrading evolves in a“gradient”manner from“impediment”to“insignificant”to“promotion”as the technological innovation levels increase.These findings offer practical guidance for tailoring industrial policies to different stages of technological advancement.

A design and application of compound multi-functional sensor in wood-based panel processing

A compound multi-functional sensor was designed by the study on the on-line testing technology of wood-based panels, and its properties of shape, functions, size, resistance to special environment were studied in details. The operational principles of different sensors, technical flow of manufacturing, development of software systems of special functions, and the assessments of technical specification were also be introduced. This sensor adopted many new technologies, such as the applications of piezoresistant effect and heat sensitive effect can effectively measure the pressure and temperature, digital signal processing technology was used to extract and treat signals, and resist interference, encapsulation technology was used to keep the normal run of sensor under a harsh environment. Thus, the on-line compound multi-functional temperature/pressure sensor can be applied better to supervise the production of wood-based panels. All technical specifications of the compound multi-functional sensor were tested and the results met the requirements of the equipments.

Little Secrets for the Successful Industrial Use of Tannin Adhesives:A Review

This brief article reviews a very particular and quite narrowfield,namely what has been done and what is needed to know for tannin adhesives for wood panels to succeed industrially.The present fashionable focus on bioadhe-sives has led to producing chemical adhesive formulations and approaches for tannin adhesives as a subject of academic publications.These,as good and original they might be,are and will still remain a rather empty aca-demic exercise if not put to the test of real industrial trials and industrial use.They will remain so without the“little”secrets and techniques outlined here that show that there is a great gap between developing an adhesive formulation in the laboratory and the hard reality to make it work where it does really count,in its industrial application.It outlines the fact that even more modern and excellent,newly developed bioadhesive formulations might well miserably fail once tried in the industry if the problems that always arise in their upgrading are not identified and solved,and solved well.It also outlines the fact that not only must costs always be taken into account and that a practical and possibly easy-to-handle approach must always be used,but too expensive or complex and unyielding adhesive systems are also often shown to be unusable or unsuitable in industry.

Economic Growth and Interaction between Financial and Industrial Structure - Empirical Analysis on Provincial Panel Data

In recent years, China's economic growth speed has been slowing down, leading to the problems of overcapacity and unbalanced regional economic development, and the mismatch between industrial and financial structure is becoming intense. Therefore, this paper, starting with the relationship among economic growth, industrial structure and financial structure, summarizes the research by the former scholars. On this basis, by using data of 31 provincial panel data in China from 2007 to 2016, the article aims to find out the relationship between the industrial structure and economic growth, the relationship between the financial structure and economic growth and the relationship between the interaction of financial and industrial structure and economic growth. Finally, the corresponding policy recommendations are obtained following the systematical empirical conclusions. The conclusions of this paper are as follows:(1) developing indirect financing mode can effectively drive China's economic growth.(2) continuing to develop the second industry can play a catalytic role in the economic growth in most areas of China.(3) the interaction between the financial structure and the industrial structure can promote the economic growth significantly. However, the matching effect of the financial structure and industrial structure in China has not been completely formed, and the industrial upgrading should be guided to be structurally reformed through the policy.

The Relationship between Financial Development and Industrial Restructuring --Based on Panel Data of 17 Areas of Shandong

Based on the Panel Data of Shan dong Province of 17 regions, by estimating varying coefficient models, studies the relationship between financial development and industrial structure.The results show that, on the whole, the financial development indicators-the scale and the efficiency can effectively promote industrial restructuring in all regions of Shandong province, but its role has obvious differences in different regions, so it can provide a basis for economic decision-making and financial policy advice.

中国文化和旅游融合发展效率时空动态演化及其驱动机制

提高文旅融合发展效率是关乎效率变革和质量变革背景下文化和旅游深度融合及高质量发展的重要科学问题,有效把握其动态演化特征及驱动机制对推动区域文化产业与旅游产业转型升级和提质增效及其深度融合高质量发展具有重要的理论价值和现实意义。文章构建文化和旅游融合发展效率分析框架,运用耦合协调模型、基于松弛变量的超效率测度模型、空间马尔科夫链和面板空间杜宾模型等方法,剖析中国2011—2019年文化和旅游融合发展效率的时空动态特征及其驱动机制。研究发现:1)中国文化和旅游融合发展效率在9年间仅提升3.4%,距离最佳生产前沿面还存在至少17.3%的潜力空间,4大区域呈东部>中部>西部>东北格局,并且仅天津、上海、广东与云南4个省份常年达到最佳生产前沿面,其他省份还存在至少6.7%~33.9%的潜力空间;2)中国文化和旅游融合发展效率大致呈现“东南沿海高值集聚,西北内陆低值集聚”空间格局,存在显著的路径依赖与马太效应现象,短期内难以实现跨越式增长,但当与高效率的省份为邻时,本地省份文化和旅游融合发展效率向上转移概率有所提升;3)产业结构与交通水平是提高本地省份文化和旅游融合发展效率的主要因素,但对邻近省份产生了负向溢出效应,科技创新、消费需求和政府调控促进了邻近省份文化与旅游融合发展效率,但对本地省份的推动作用尚不显著,服务队伍抑制了本地省份文化与旅游融合发展效率,但对邻近省份的溢出效应并不显著。

区域旅游产业集聚对旅游经济韧性的影响及其空间效应研究——以长江经济带为例

科学洞悉区域旅游集聚对旅游经济韧性的影响及其空间效应,对提升区域旅游经济韧性和实现旅游经济高质量发展意义重大。文章构建区域旅游产业集聚影响旅游经济韧性的机理框架,以长江经济带11省市为案例地,采用区位熵和熵值法得到长江经济带旅游产业集聚度和旅游经济韧性水平,借助面板空间杜宾模型揭示出区域旅游产业集聚对旅游经济韧性的影响及其空间效应。结果表明:(1)研究期内,长江经济带旅游经济韧性水平整体呈上升趋势,且东部地区大于中西部地区,但存在明显的省际差异。长江经济带东部地区旅游经济韧性水平大于中西部,而中西部地区的旅游经济韧性水平增长率大于东部。(2)长江经济带省市旅游产业集聚水平整体上升,受旅游业在当地经济中的地位影响,呈现出西部高于中部,高于东部的格局。(3)区域旅游产业集聚对旅游经济韧性产生明显的正向空间效应,即区域旅游产业集聚不仅可以提升本省旅游经济韧性水平,并且可以产生显著的空间溢出效应来提升省周边区域的旅游经济韧性水平。

产业链创新链融合对低碳转型的影响效应研究

加快实施创新驱动发展战略,促进产业链与创新链融合是实现低碳转型的重要举措。在梳理产业链创新链助推低碳转型相关文献的基础上,利用中国省级面板数据系统考察了产业链创新链融合对低碳转型的复杂影响效应。研究结果表明:(1)产业链创新链融合显著促进了低碳转型发展,这一结论在经过多重稳健性检验后依然成立,并且产业链创新链融合对低碳转型的影响在双重目标约束下存在一定的异质性。(2)机制分析表明产业链创新链融合可以通过产业结构升级、绿色技术进步和能源效率提升等路径推动低碳转型发展。(3)进一步分析发现在实现低碳转型的过程中,产业链创新链融合效果呈现出“先降后增”的“U”型阶段性特征。

服务业产业多样化对城市经济韧性的影响——来自地级市夜间灯光数据的证据

本文利用夜间灯光栅格数据,测算了2008—2019年我国281个地级市的经济韧性,并研究了服务业产业多样化类型对城市经济韧性的影响。研究发现:服务业产业无关多样化程度越高的城市经济韧性相对越强,而相关多样化对城市经济韧性具有部分负向作用。多种检验表明上述结果稳健。不同城市规模和区域一体化程度的产业多样化与城市经济韧性关系具有一定区别,但总体上同质性大于异质性。利用中介效应检验进行作用机制分析后发现,服务业无关多样化可通过提高服务业就业水平和产出水平提高城市的经济韧性。因此,城市经济规划建设中应将提升经济韧性作为重要考虑因素,结合服务业产业多样化特征因地制宜,根据城市规模适度提高城市产业多样化。

西部地区城镇居民文化消费的影响机制

基于2010—2020年西部地区数据,运用固定效应面板模型对城镇居民文化消费的内在影响机制进行实证分析。结果表明:科技创新和文化产业集聚对西部地区城镇居民文化消费影响均有促进作用;区域异质性和产业异质性方面,科技创新和文化产业集聚对西南地区城镇居民文化消费的促进效用均高于西北地区,且对文化服务业的消费市场影响最显著。为了优化西部文化消费结构,应探索文化产业的科技创新型发展路径,提升文化消费市场潜力。

人口老龄化、财政支出效率与产业结构升级——理论机制与经验证据

本文在分析人口老龄化、财政支出效率与产业结构升级三者内在机理的基础上,利用2001—2019年我国省级面板数据并结合面板平滑转换模型和动态空间杜宾模型,对提出的理论假说进行实证检验。研究发现,财政支出效率、产业结构升级在时间、空间和时空三个维度均具有显著的路径依赖性、空间外溢性和竞争滞后性特征。人口老龄化对财政支出效率和产业结构升级均具有显著的非线性影响,且人口年龄结构差异使得人口老龄化的影响存在区域异质性。总体来看,人口老龄化阻碍了产业结构高级化和制造业转型升级,但促进了产业结构合理化和服务业结构升级,且提高了财政支出效率。财政支出效率提升不仅弱化了人口老龄化对产业结构升级的负效应,还成为人口老龄化发挥正向影响的重要传导渠道。上述结论对于推动我国产业结构升级、实现经济高质量发展具有一定的理论和现实意义。

城市数字普惠金融发展对碳排放强度影响研究

数字普惠金融作为一种新兴金融形态,为实现“双碳”目标发挥了重要作用。文章以2011—2021年中国279个城市面板数据为研究样本,运用基准回归模型、面板门槛模型以及空间杜宾模型,分析了城市数字普惠金融发展对碳排放强度的影响。研究发现:数字普惠金融发展能够显著降低碳排放强度,在经过一系列稳健性检验后该结论仍然成立;数字普惠金融发展对碳排放强度的影响存在空间溢出效应和异质性;数字普惠金融会因自身发展水平、产业结构发展水平和绿色金融发展水平的不同对碳排放强度产生非线性影响。

我国物流业韧性评估与驱动因素研究

基于2011—2020年我国省级面板数据评估我国物流业韧性水平,利用自然断裂点法分析其空间格局演化特征;采用动态面板回归方法实证检验了我国物流业韧性的影响因素.研究表明:①我国物流业韧性整体呈现不断增强的态势,以及从东南沿海向西北内陆梯度下降的趋势.②东部沿海地带提升速度显著高于中西部地带,区域差异不断拉大.③总体而言,劳动力质量、产业结构高级化对物流业韧性具有正向作用,政府支持度具有负向作用.④分组回归结果显示,产业结构高级化、金融环境对低韧性地区具有正向作用,产业结构合理化对高韧性地区具有正向作用.基于此,最后提出了相关政策建议.

国内贸易影响了区域工业竞争力吗?——来自安徽省城市面板数据的证据

在运用竞争优势理论解析国内贸易对区域工业竞争力影响机理,构建总体回归模型和工具变量模型,并在施加多种估计策略后得到的回归结果表明:国内贸易对于区域工业竞争力提升具有显著的正向促进效应,且重要程度相对更高。这一结果在考虑内生性情况下仍然成立,并通过了多种稳健性检验。进一步分组群分析结果显示:正向促进效应具有显著的企业性质和地理区位的异质性,其中非国有企业与皖南地区组群的平均估计效应相对较高。在新发展阶段,安徽省理应优先推动国内贸易水平提升,在因地制宜加快形成高质量发展的区域经济布局下,突出非国有企业和皖南地区对提升安徽工业竞争力的相对重要性。

中国人造板产业标准化发展30年回顾与展望

标准化在推动产品和服务质量提升、促进转型升级、推进高质量发展、保护消费者权益等方面都发挥着重要的支撑和引领作用。人造板标准化在中国人造板产业发展中发挥了重要作用。本文回顾了30年以来中国人造板产业标准化发展取得主要成就,结合建设支撑现代化人造板产业体系与人造板质量强国的需求,提出了中国人造板标准化工作未来发展目标和4项工作重点。

大枣产业发展对榆林乡村振兴的影响实证——基于面板固定效应模型

以榆林乡村振兴局搜集到的大枣产业数据和榆林统计年鉴(2013~2022)的数据为基础,采用最小二乘法估计面板固定效应模型参数,然后通过逐步回归法逐步分析红枣产业整体发展水平kit、红枣总产值占比d_eit、种植面积占比d_fit和红枣产量占比d_git对乡村农民收入、产业融合和乡村就业的影响。结果表明,无论是单变量,还是多个变量的情况下,kit、d_eit、d_fit、d_git对乡村农民收入产业融合都有着正向影响;在多变量下,加入d_fit和d_git后没有通过显著性检验,但kit、d_eit对乡村农民收入和产业融合呈现为正向显著影响。最后根据分析结果,总结了当前榆林大枣产业发展的问题,并提出了相应的建议。以期为提升榆林市大枣产业的经济效益、促进乡村振兴战略的开展和实施提供参考。

基于时变空间权重矩阵面板数据模型的京津冀产业转移环境效应研究

环境污染尤其是大气污染成为影响京津冀地区社会发展一个不容忽视的问题,环境库兹涅茨曲线(EKC)是分析环境问题的常用工具,而很多相关文献的模型未考虑到空间溢出效应及其时间传导途径,忽视了产业转移对环境污染的影响效应。基于以上问题,本文在分析中引入产业转移指数,以空间面板数据模型为分析工具,采用一种内生时空权重矩阵对京津冀地区开展分析。研究结果表明:产业转移对邻近地区环境影响作用更显著,三产比重的提高能有效缓解当地环境污染,京津冀地区工业二氧化硫排放与GDP增长呈正N型。因此,提高高污染工业转移门槛和工业排污标准、提高三产占比以及提高工业固体废物综合利用率对京津冀地区以及其邻近地区环境改善有重要意义。

我国海洋产业集聚促进了沿海地区创新发展吗?

在陆域资源日益趋紧的现实约束和创新驱动的战略背景下,合理布局海洋产业以助力区域创新发展对沿海地区显得尤为重要。在理论分析的基础上,以2003-2019年11个沿海地区作为研究区域,利用系统GMM方法估计动态面板模型,实证检验海洋产业集聚对沿海地区创新水平的影响效果。研究表明,总体而言,我国海洋产业集聚可以有效带动沿海地区创新水平的提高;细分集聚模式下,沿海地区创新发展主要得益于多样化集聚,专业化集聚效应不明显。进一步研究表明,不同海洋产业集聚模式对沿海地区创新发展的影响效果与市场化水平有着密切关系。相关结论有助于重新认识和评价海洋产业集聚在沿海地区创新发展中的作用,对于实现集聚格局具有借鉴意义。

研究生教育对区域经济发展的影响研究

以省际面板数据为样本,以第三产业经济和人均GDP为经济度量指标,以研究生教育和科技创新等为解释变量,构建了31个省以及东中西部三大区域的各类回归模型。实证分析表明:我国的研究生教育可直接促进区域经济增长(硕士的影响效应高于博士),并通过科技创新变量间接推进经济发展。对三大区域进行纵横比较发现,东部整体态势较好,显著优于中部和西部;中西部地区硕士对经济的影响力显著高于博士,西部研究生教育和产业结构明显不匹配。