Influence of Social Media over the Stock Market

This research analyzes investors’ activity through social media and these media's influence over the Chicago Board Options Exchange Market Volatility Index (VIX) using a logit model and a fuzzy‐set qualitative comparative analysis (fsQCA). The logit results show that social media sentiment influences stock markets. Meanwhile, the fsQCA results show that the investors’ profile is important for explaining how social media influence the stock market. Particularly, holding period combined with experience in technical investors contributes to avoiding a raise in market risk, whereas for nontechnical investors message sentiment and experience form the combination that contributes to avoid a raise in market risk.     

绿色全要素生产率的区域差异与动态演化

文章基于2001-2017年中国大陆30个省份的面板数据,综合运用SBM-DEA模型、dagum基尼系数和马尔科夫链等多种方法,对中国绿色全要素生产率的区域差异与动态演化进行了分析.研究发现:中国绿色全要素生产率整体呈波动上升趋势,存在显著的非均衡特征且随着时间的推移明显加剧;区域间差异与超变密度差异是绿色全要素生产率差异的主要来源;中国区域绿色全要素生产率各种状态间的流动性较高.最后,研究从推进区域一体化战略,加强落后地区的基础设施建设及提高企业的信息化能力等方面提出缩小绿色全要素生产率差异的政策建议.     

供应链金融智慧化创新的内在机理研究——基于扎根理论的探索性分析

文章基于10个智慧供应链金融案例,对供应链金融中信息通信技术的赋能机制、作用机理及所实现的智慧效应进行了梳理,报告了供应链金融进行智慧化创新的内在逻辑.通过采用扎根理论方法,展开实践案例资料调查,反映了供应链金融业务迫切需要新的技术支撑以解决资金供需双方的信息不对称问题,进而构建出"需求—手段—中介—效应"这一供应链金融创新机理模型,揭示了供应链金融智慧化创新的路径方法.     

Employee share ownership in a unionised duopoly

Profit sharing schemes have been analysed assuming Cournot competition and decentralised wage negotiations, and it has been found that firms share profits in equilibrium. This paper analyses a different remuneration system: employee share ownership. We find that whether firms choose to share ownership or not depends on both the type of competition in the product market and the way in which workers organise to negotiate wages. If wage setting is decentralised, under duopolistic Cournot competition both firms share ownership. If wage setting is centralised, only one firm shares ownership if the degree to which goods are substitutes takes an intermediate value; otherwise, the two firms share ownership. In this case, if the union sets the same wage for all workers neither firm shares ownership. Therefore, centralised wage setting discourages share ownership. Finally, under Bertrand competition neither firm shares ownership regardless of how workers are organised to negotiate wages.     

Assessing the competition in Angola’s banking industry

This article analyses the level of competition in Angola’s banking industry using the Panzar–Rosse model with data from 2005 to 2014. Competition is a vital aspect of the banking market and therefore it is central to policy-making. The results reveal that Angola banking competition is monopolist and therefore lower competition is found in Angola banks. Policy implication is derived.     

Tacit collusion in housing markets: the case of Santiago,Chile

In this article, using a detailed micro-database from Santiago, Chile, the potential existence of tacit collusion in housing markets is investigated. In order to perform the test, Santiago’s housing market is split into four different submarkets using hedonic price analysis and household’s socioeconomics characteristics. Then, using a GMM panel data model, regressions are run for each submarket, correlating industry’s markups with the aggregate level of activity. The main finding is that low and middle income submarkets present higher average markups and a pro-cyclical behaviour. This finding is consistent with a market where participants do not face capacity constraints and behave strategically to sustain tacit collusion during increasing demand periods.     

The impact of pre-announced day-to-day interventions on the Colombian exchange rate

Using cross-country cross-industry data, this paper explores how industry’s growth in number of firms in Central-East Europe (CEE) region is influenced by bank concentration in both the pre-crisis and crisis periods. The CEE region shows highly concentrated banking markets and less-developed financial markets; thus, the level of bank concentration and the resulting credit supply are crucial for firm creation and survival. Despite this, there is little evidence on these countries in the literature. Our empirical results suggest an inverted-U relationship: industry growth is fostered by bank concentration, but there is a turning point from which higher concentration begins producing the opposite effect. Moreover, the positive impact has a greater intensity during the crisis period compared to the pre-crisis period. Between sectors’ analysis shows that high-tech sectors are less reactive to changes in the concentration level.     

Sustainability accounting regulation in Spanish public sector organizations

In 2011, the Spanish government made sustainability accounting mandatory for public sector organizations. This paper documents why, despite the new legislation, the quantity and quality of sustainability accounting practices remains low.     

我国城市化与城乡收入差距非线性动态关系实证研究

探讨城市化对城乡收入差距的影响效应，对于我国经济高质量发展具有重要意义。本文基于1978—2015年的相关数据，采用平滑转换回归（STR）模型研究了我国城市化对城乡收入差距的非线性影响效应。研究发现，城市化与城乡收入差距两个变量之间的动态关系适合使用非线性的LSTR2模型来刻画，并且我国城市化缩小了城乡收入差距。考虑了经济增长和产业结构升级因素后，城市化还是缩小了城乡收入差距，经济增长因素也能够缩小城乡收入差距，但是产业结构升级因素却拉大了城乡收入差距。