基于最新统计分类标准的数字经济发展水平测度

随着信息技术的发展,数字经济已经成为经济增长的"新引擎"。但由于缺乏权威的产业统计分类标准,学者们一直面临"数字经济研究缺乏数字依据"的尴尬境地。文章基于国家统计局公布并实施的《数字经济及其核心产业统计分类(2021)》中的分类标准,对各省份统计年鉴的数据进行重新整理,利用熵权法构建数字经济发展指数,测度了我国30个省份的数字经济发展水平,分析了各省份数字经济发展的差异以及时空特征。研究发现,2009—2019年我国数字经济产业发展迅猛,各项子产业都取得了长足的进步。相比较而言,数字要素驱动业发展速度略低于其他三个子产业;数字经济发展存在着明显的区域不平衡。东中部地区的数字经济发展状况明显优于西部地区,南方优于北方,而且区域不平衡有持续扩大趋势。     

区块链技术与企业绩效:公司治理结构的调节作用

当前,我国正在全面迈进数字经济新时代.区块链技术作为数字经济最为重要的基础技术设施之一,正在加速推动新一轮产业变革和数字创新,被越来越多的企业接受和应用.区块链技术对企业绩效的作用机制是什么?针对以上问题,本研究通过倾向得分匹配方法(PSM)选取2014-2019年中国沪深A股上市公司为研究样本,以当年是否引入区块链技术作为公司治理手段为哑变量,通过计量分析研究了区块链技术应用与企业绩效之间的关系,并进一步探索了公司治理结构在区块链技术应用与企业绩效关系间的调节作用.研究发现,区块链技术应用对企业绩效有促进作用;当公司治理结构呈现较高独董比例和较高股权集中度时,区块链技术应用对企业绩效的促进作用得到加强.     

Migration and fuel use in rural Zambia

Population and Environment - What is the effect of migration on fuel use in rural Zambia? Opportunities to increase income can be scarce in this setting; in response, households may pursue a...     

长征时期我党关于民族问题探索的历史演变与现实启示

中国工农红军长征时期，党高度重视民族问题，制定和实施了一系列符合中国革命和民族实际的民族纲领政策，开创了一条运用马克思主义民族理论解决中国民族问题的探索之路。中国共产党早期的民族纲领与民族政策主张是从马克思列宁主义关于民族独立、民族分离、建立联邦或区域自治等方面去阐释。随着我国革命形势的发展变化，党已认识到民族独立或联邦制并不符合中国的国情，不主张民族自决和实行联邦制，并最终确认了在统一的国家中实行民族区域自治的政策。认真分析长征时期党民族理论政策的发展演变进程，对新时期科学总结党民族工作经验和指导民族工作实践，不断发展和完善中国特色社会主义民族理论体系，实现中华民族伟大复兴具有重要意义。     

Clients' Attributions of the Presenting Problem and the Therapeutic Alliance in Couple Therapy: Systemic Versus Intrapersonal Perspectives

The therapeutic alliance is central to couples' therapy success. The current study examined associations between couples' initial agreement and causal attributions of the presenting problem and changes in the therapeutic alliance. To test study hypotheses, 85 couples were recruited from a university training clinic focused on couple and family therapy. Couples completed an intake questionnaire concerning their attribution of the presenting problem, either as systemic or individual, and therapeutic alliance was assessed at the end of sessions 2–8. A dyadic multilevel model revealed that a disagreement in the couple's attributions of the problem (with one viewing it as systemic, the other as individual) was associated with a larger initial discrepancy in the couple's therapeutic alliance, as well as a decline in the discrepancy over time. Findings were discussed in the context of systemic family theory, with implications for improving assessment, treatment, and psychoeducation aimed toward couples in distress.     

Psychometric validation of the PERMA-profiler as a well-being measure for student veterans

Abstract

Objective: The current study aims to validate the PERMA-Profiler, a well-known well-being measure, among a sample of student veterans. Participants: A sample of 205 student veterans were recruited from universities across the United States. Method: Cross-sectional research design was used in this study. Measurement structure of the PERMA-Profiler was evaluated using exploratory factor analysis (EFA). Convergent, divergent, and criterion-related validity was tested using Pearson correlation coefficients and Kruskal-Wallis test. Results: The EFA results yielded a two-factor solution for student veterans. Factors are named as emotional character strengths and performance character strengths. Conclusions: The PERMA-Profiler is a multidimensional scale with good reliability and acceptable levels of convergent, divergent, and criterion-related validity. The PERMA-Profiler can help researchers and practitioners better gauge well-being in student veterans. Implications will be discussed.     

市场不确定性、产业扶贫项目参与对农户贫困脆弱性的影响

探讨市场不确定性、产业扶贫项目参与对农户减贫效果的影响机制,对于管控产业扶贫项目实施风险、提高产业扶贫绩效具有重要现实意义。利用陕西省秦巴山区776户农户调研数据,借助两阶段最小二乘法和内生转换回归模型实证研究了市场不确定性、产业扶贫项目参与对农户贫困脆弱性的影响,并在反事实假设的基础上估计了农户参与产业扶贫项目对贫困脆弱性的平均处理效应。实证结果表明:农户产业扶贫项目参与能有效缓解贫困脆弱性,相较于未参与农户,参与农户贫困脆弱性显著降低26.22％。进一步研究表明,市场不确定性显著抑制农户产业扶贫参与,且加深了农户贫困脆弱性。基于此,从合理选择产业扶贫项目、搭建有效利益联结机制、优化农业保险体系等方面得出针对性的政策启示。     

获得感：概念、机制与统计测量

获得感作为一个极具中国特色的本土化概念，近年来得到了越来越多的重视。获得感有一个从顾客满意度到获得感的发展过程，是指个体在获取某种利益之后，内心深处所产生的一系列主观感受，是一种满足和幸福的积极情绪体验，而这种感受要建立在实实在在的获得基础之上，具有主观性、客观性以及可测性等主要特征。基于此，获得感的结构兼具物质根源和心理根源，物质根源是获得感的基础，心理根源是获得感的核心。而获得感的测量方法应该注重自陈式路径，统计测量指标也需要主客观指标相结合。在技术上，研究者可利用自上而下的方法和自下而上的方法确定合理的指标维度，用主观评定法以及因子分析法确定获得感各指标的权重系数。     

Optimal asset allocation for participating contracts with mortality risk under minimum guarantee

Abstract

We investigate an optimal investment problem of participating insurance contracts with mortality risk under minimum guarantee. The insurer aims to maximize the expected utility of the terminal payoff. Due to its piecewise payoff structure, this optimization problem is a non-concave utility maximization problem. We adopt a concavification technique and a Lagrange dual method to solve the problem and derive the representations of the optimal wealth process and trading strategies. We also carry out some numerical analysis to show how the portfolio insurance constraint impacts the optimal terminal wealth.