数字经济发展的碳减排效应研究——基于223个地级市的实证检验

发展数字经济是有效降低城市碳排放强度的重要抓手。利用2016—2020年中国223个地级市面板数据,实证研究了数字经济发展对城市碳减排效应的影响。研究发现:数字经济发展能够降低城市碳排放强度;数字经济发展通过提高能源环境效率和推进产业结构高级化、合理化等渠道降低城市碳排放强度;战略性新兴产业创新能力加强了数字经济发展对碳排放强度的抑制作用。数字经济发展在降低城市碳排放强度的进程中存在双重门槛,只有在数字经济发展超过特定门槛值时,碳减排效应才会显著,且其效应呈现出递减特征。异质性分析表明,数字经济发展能降低非中心城市和非资源型城市碳排放强度,但对降低中心城市和资源型城市碳排放强度的影响不显著。因此,政府应积极抓住大数据、云计算、人工智能等“新基建”的发展机遇,夯实数字经济基础底座,实现城市碳减排。     

基于自组织的大型建筑企业控制力协同进化研究

针对大型建筑企业控制力动态协同的定量化仿真问题,基于复杂系统视角,应用自组织理论分析大型建筑企业控制力自组织耦合网络作用关系,选择有效朗之万方程构建大型建筑企业控制力系统的自组织协同进化模型,通过线性近似法的性态稳定求解非线性方程的稳定性,得出大型建筑企业控制力系统协同进化演化过程的四个决定性参数,并通过MATLAB软件进行参数枚举取值,具体分析企业控制力协同演化。案例验证该模型可对大型建筑企业控制力协同演化最佳状态实现更加精确的参数取值,并发现大型建筑企业控制力协同演化最佳状态的充要条件,以及一种新的大型建筑企业控制力协同演化状态。     

State transition modeling of complex monitored health data

This article considers the analysis of complex monitored health data, where often one or several signals are reflecting the current health status that can be represented by a finite number of states, in addition to a set of covariates. In particular, we consider a novel application of a non-parametric state intensity regression method in order to study time-dependent effects of covariates on the state transition intensities. The method can handle baseline, time varying as well as dynamic covariates. Because of the non-parametric nature, the method can handle different data types and challenges under minimal assumptions. If the signal that is reflecting the current health status is of continuous nature, we propose the application of a weighted median and a hysteresis filter as data pre-processing steps in order to facilitate robust analysis. In intensity regression, covariates can be aggregated by a suitable functional form over a time history window. We propose to study the estimated cumulative regression parameters for different choices of the time history window in order to investigate short- and long-term effects of the given covariates. The proposed framework is discussed and applied to resuscitation data of newborns collected in Tanzania.     

媒介发展背景下收视注意力变化及其对电视剧创作的影响

媒介发展为大众传播带来巨大变化,影响了收视方式,也影响了观众对电视剧的注意力投入。从传统媒体时代到移动互联网时代,观众的注意力呈现出与收视氛围、收视状态变化相对应的特征变化——投入程度变深,投入时间缩短。观众的注意力从更换率低的、长时间的、无互动性的内容转移到更换频繁的、短时间的、有互动性的、社交式的内容上。在此情境下,电视剧创作必然呈现符合观众与媒介间注意力法则的新趋势——内容长度缩短,情节强度增强,以及对互动性进行一系列探索。     

城市韧性与城市宜居性耦合协调研究——以长三角城市群为例

文章基于2010—2020年长三角城市群内26个城市的面板数据,结合长三角城市群城市韧性和宜居性发展现状,利用熵值法分别测算二者综合发展指数,在此基础上,进一步运用耦合协调模型进行定量分析。结果表明：长三角城市韧性与城市宜居性总体水平不断上升,相对而言,城市宜居性的发展水平要略高于城市韧性;两系统耦合协调指数较高,总体呈现出相对稳定的态势,区域内部上海耦合协调度保持在最高水平,协调城市类型主要以初级和中级协调为主;空间格局上耦合协调城市板块呈现出环绕式聚集分布。据此,提出通过加强韧性建设来提高城市抵御风险的能力、因地制宜以特色发展打造宜居韧性城市、城市转型实现长三角城市群协调发展等政策建议,进而推动长三角城市群整体综合发展能力,实现以点带面辐射整个城市群。     

黄仁宇悖论与帝国逻辑——以科举制为线索

黄仁宇悖论描述了中华帝国组织形态松散关联但国家秩序坚韧稳定的矛盾特点。本文以科举制为线索,着眼于历史上中华帝国的观念制度来解读这一悖论,特别是这一松散关联组织形态的机制和过程。在中国历史上,科举制度提供了观念一体化的组织基础,导致了官僚体制内外正式与非正式制度的双向渗透和互构,国家与基层社会上下名与实的仪式性连接。这一观念制度提供了各地区、各层次间的同构性和相互关联,同时造就了一个松散关联的官僚组织。结束部分的“余论”指出,在当代中国,国家治理模式发生了重要转型,从观念一体化转向为组织一元化,为国家治理带来了一系列鲜明的特点和新的挑战。     

技术创新与企业就业效应--基于微观企业调查数据的实证分析

利用2012年世界银行关于中国工业企业的调查数据,从流程创新、产品创新和企业研发三个维度分析了短期内技术创新对就业增长的影响。结果显示,流程创新与就业增长显著负相关;产品创新与就业增长显著负相关;企业研发与就业增长负相关,但较前两者显著性较弱。进一步研究发现,与东部沿海地区相比,中西部地区技术创新的就业替代效应更为明显。鉴于上述研究结果,对现有技术创新方式和政策提出相应的对策建议。     

Intensities of mobility: kinetic energy,commotion and qualities of supercommuting

This paper explores the intensities of long-distance commuting journeys in order to understand how bodily sensibilities become attuned to the regular mobilities which they undertake. More people are travelling farther to and from work than ever before, owing to a variety of factors which relate to complex social and geographical dynamics of transport, housing, lifestyle, and employment. Yet, the experiential dimensions of long-distance commuting have not received the attention that they deserve within research on mobilities. Drawing from fieldwork conducted in Australia, Canada, and Denmark this paper aims to further develop our collective understanding of the experiential particulars of long-distance workers or ‘supercommuters’. Rather than focusing on the extensive dimensions of mobilities that are implicated in broad social patterns and trends, our paper turns to the intensive dimensions of this experience for supercommuters by developing an understanding of embodied kinetic energy, commotion and quality. Exploring how experiences of supercommuters are constituted by a range of different material and bodily forces enables us to more sensitively consider the practical, technical, and affective implications of this increasingly prevalent yet underexplored travel practice.     

港口经济与城市经济系统耦合协调度实证研究

我国正处于港口高速建设和城市迅速发展时期,协调港口和城市功能的关系对提高港口城市的综合能力具有重要意义。在深入分析港城经济系统耦合机理的基础上,采用熵权法选取港口经济与城市经济的耦合元素指标,并以深圳港为例,运用耦合度模型与耦合协调度模型进行实证分析,动态把握港口经济与城市经济的耦合协调状态。研究表明,2000~2011年期间,深圳港口经济与城市经济两大系统的耦合系统程度趋向转好,耦合发展类型由严重不协调衰退向高级协调发展转变,并有向优质协调发展的趋势,体现了两大系统的协同效应。     

Did small and medium enterprises maintain better jobs during the early years of the recession? Job quality multidimensional evidence from Spain

While the literature has indeed confirmed a general tendency linking small and medium enterprises (SMEs) to a dynamic of greater job creation, there is little available evidence on what has happened to job quality since the financial crisis. Through a representative sample of 5311 employees in 2008 (first year of job destruction) and 4925 employees in 2010 (last year for which data were available), and using a two-stage structural equation model, this article empirically analyses the multidimensional determinants of job quality, by enterprise-size class, in Spain. The research has revealed three main results. First, job quality in Spain improved in all enterprises, regardless of their size, during the early years of the recession. Second, the greatest improvements were found in SMEs. Although job quality was already better in SMEs than in large enterprises in 2008, the differences between them subsequently widened. Third, this accelerated divergence was explained by the following dimensions: working conditions, work intensity, health and safety at work, and work–life balance. These dimensions were much more positive in SMEs. Employment-related public policy should therefore focus more specifically on SMEs. There are two reasons for this. First, despite the recession, SMEs have shown themselves to be key factors in the explanation of job quality. Second, by making changes to their value generation model, they could continue to drive the creation of better quality jobs.