COVID-19, stock market and sectoral contagion in US: a time-frequency analysis

We assess the conditional relationship in the time-frequency domain between the return on S&P 500 and confirmed cases and deaths by COVID-19 in Hubei, China, countries with record deaths and the world, for the period from January 29 to June 30, 2020. Methodologically, we follow Aguiar-Conraria et al. (2018), by using partial coherencies, phase-difference diagrams, and gains. We also perform a parametric test for Granger-causality in quantiles developed by Troster (2018). We find that short-term cycles of deaths in Italy in the first days of March, and soon afterwards, cycles of deaths in the world are able to lead out-of-phase US stock market. We find that low frequency cycles of the US market index in the first half of April are useful to anticipate in an anti-phasic way the cycles of deaths in the US. We also explore sectoral contagion, based on dissimilarities, Granger causality and partial coherencies between S&P sector indices. Our findings, such as the strategic role of the energy sector, which first reacted to the pandemic, or the evidence about predictability of the Telecom cycles, are useful to tell the history of the pass-through of this recent health crises across the sectors of the US economy.     

Quantifying the impact of the COVID-19 pandemic on US airline stock prices

This paper uses data at the trading day frequency and the method of local projections to quantify the dynamic responses of U.S. airline stock prices to a COVID-19 shock. We show that airline stock prices decline immediately by 0.1 percentage point in response to a 1% COVID-19 shock. In addition, the effect of the shock persists beyond the day on which it occurs, with most airline stock prices falling by as much as 0.6 percentage points after fifteen days. This negative response of airline stock prices to a COVID-19 shock is not explained by a COVID-19-induced increase in airlines’ variable costs, but rather by a COVID-19-induced decrease in air travel, which, in turn decreases revenues, profitability, and stock prices of U.S. airlines.     

君特·格拉斯和《猫与鼠》

格拉斯是德国当代著名作家 ,是 1999年诺贝尔文学奖获得者。《猫与鼠》是格拉斯《但泽三部曲》的第二部。文本以动物隐喻的方式叙述了纳粹文化对个体的驯化。主人公马尔克本是个善良的青年学生 ,因为生活在希特勒的国家社会主义时代 ,在纳粹文化的诱骗下 ,丧失了自我道德、自我价值 ,最终走向毁灭。马尔克的命运是特定背景下青年人相同相近的精神状态的真实写照     

疫情之下增强财政免疫力的思考

应对疫情的财政政策对财政自身的收支平衡产生很大的冲击,这更凸显了财政制度建设的重要性。本文认为,财政制度建设需要建立在以下六个认识基础上:国家需要与其经济发展阶段相匹配的财力;税收成本一般低于其他形式财政收入;税收第一位功能是筹集财政收入,而不是其他;通过国有企业支撑财政不是长久之计;提高财政透明度、加强财政预算审查是财政提质增效的最好办法;财政改革最终落脚到现代治理观念和方式的变革。     

重大突发公共卫生事件科技研发应急体系运行机制研究

在突发事件应急管理过程中,科技研发支撑作用十分关键,亟需建立突发公共卫生事件科研应急体系长效运行机制。基于科技研发应急体系的复杂性、适应性特征,从主体属性和体系架构两个层面入手,分析重大突发公共卫生事件科技研发应急体系的复杂适应系统特征,运用复杂适应系统理论模型和动态闭环螺旋模型,研究重大突发公共卫生事件科技研发应急体系运行机制。研究发现,重大突发公共卫生事件背景下,科技研发应急体系具有复杂适应系统的7个基本特征,是典型的复杂适应系统;科技研发应急体系中,科研攻关专家组、诊疗医院、科技部门等科研主体具有各自内部模型,并通过6大标识进行聚集;科技研发应急体系存在事件—需求引导、主体协同、资源交互、成果转化机制。同时,新冠病毒肺炎疫情应对实践表明,疫情防控救治进程中科技研发应急体系存在并遵循上述运行机制。     

数字化赋能视角下突发公共事件应急管理系统研究——以新型冠状病毒肺炎疫情为例

基于应对新型冠状病毒肺炎疫情治理的实践背景,以数字化赋能理论为分析视角,从结构赋能、资源赋能和心理赋能3个层面提出数字化赋能应急管理的内在机制。在此基础上,结合“共同治理”和“元治理”理念,对数字化赋能情境下突发公共事件合作治理系统目标、构成主体和运作机制进行探索性研究。结合案例探讨公民参与、数字化赋能如何进一步提升国家治理能力,对我国新时期应急治理体系完善和治理能力现代化建设具有一定启示意义。     

A New Typology for Economic Sectors with a view to Policy Implications

This paper is an attempt to tease out a typology of economic sectors based on a systems approach to innovation and economic growth that may be useful for policy analysis. The typology explored here revolves around novel products rather than ethereal knowledge-producing entities. This insight goes back to Allyn Young (1928) and Joseph Schumpeter (1934) who argued that the introduction of new goods was the engine of economic growth. More precisely, our typology of sectors focuses on novel products which are efficiency-enhancing within and between sectors through the market mechanism. The scheme revolves around the relationship between 'Enabling' and 'Recipient' sectors (which gives the typology its name: ER), and offers a lens for viewing and interpreting a substantive part of the mechanics of modern economic growth. The last part of the paper briefly discusses a few immediate policy implications, although it has the potential for greater use and value in this regard.     

论先锋小说的崛起及其艺术影响

先锋小说是在对传统现实主义创作精神和艺术手法的反叛中确立自己的先锋性地位的。它的崛起与存在主义、后现代主义、后现代小说、现代叙事理论尤其是结构主义文学理论在国内的引入密切相关。先锋小说或多或少地表现出后现代倾向与后现代性，贯穿于其中的理论观念，则是西方形式主义的艺术情结：小说形式、语言的文体实验。先锋小说对“真实性”的重新体认，使被意识形态遮蔽的人性侧面得到深入揭示。     

Air-travelers' concerns emerging from online comments during the COVID-19 outbreak

This research aims to assess air travelers' concerns affected by the Coronavirus pandemic, expressed in the comments they wrote online. A sample of 639 comments written on the Italian National Consumer Union website and related to the airline industry was assessed through an automated sentiment analysis in this study. The achieved results showed that travelers' concerns were directed mainly towards compensations, cancellations, and COVID-19 and at the same time, they had mixed and unpredictable feelings. This element suggests that consumers may have understood that airline companies are facing unsustainable cash-flow and revenue situations. Moreover, all our hypotheses, grounded on existing literature, were refuted. Accordingly, we argue that the actual context prevents assessments based on previous assumptions, and studies related to the impact of COVID-19 need to be conducted anew.