Uncovering the global network of economic policy uncertainty

This study uncovers the static and dynamic network of economic policy uncertainty (EPU) across 17 developed and emerging economies. We build a centrality network using the minimal spanning tree (MST) as well as a dependency network using partial correlations. Results from the MST show that EPU exhibits some degree of geographical connections with EPUs in seven countries in the sample directly linked to the US EPU. Evidence from dynamic time-varying MST reveals that the nature and dominance of the EPU network have changed significantly over time. Further, the US and German EPUs dominate a close-knit global policy uncertainty network with the highest net (To and From) transmitter of information flow in the dependency network. Greece, Russia, and Brazil are the top three net receivers of information in the global network of EPU. The policy implication of these results relates to the renewed and ongoing international debate on policy coordination.     

新疆林木种苗产业的市场结构、企业行为与市场绩效

市场结构和行为对市场绩效的影响机制是解释产业发展的重要前因。通过实地调研,分析新疆林木种苗产业组织市场结构-市场行为-市场绩效内在规律。结果表明,新疆林木种苗产业市场结构属于垄断竞争型市场结构;相当数量企业生产能力效率较低;市场种苗产业的生产能力利用率不高,市场绩效低下。基于结论,提出从优化市场结构,调整市场行为两个方面进行产业政策调整,进而提高市场绩效。     

Managing the foreign investment portfolio: How industry and governance diversity influence firm performance

Foreign investment has been seen as an important strategy for learning about new technologies and markets. However, the link between the characteristic of a foreign investment portfolio and firm performance has not been examined in detail. Using panel data from 199 Taiwanese firms, this study examines how the foreign investment portfolio in terms of industry and governance diversity influences firm performance. This study finds that governance diversity has an inverse U-shaped relationship to firm performance, whereas industry diversity does not. In addition, this study also finds that their relationships are affected by R&D capability and industry profitability. The empirical findings of our study are useful for firms that invest in emerging economies.     

Does hospitality diversity education make a difference in undergraduate students’ emotional intelligence

Soft skills are typically referred to as the attributes exhibited or contained by an individual that display his/her ability to interact with others. Two types of soft skills that are often discussed within the hospitality industry are diversity awareness and emotional intelligence. Diversity may be explained or defined as a state of unlikeness, the conditions of being different, and all things that make us different. Areas where differences may exist include race, ethnicity, gender, sexual orientation, socio-economic status, age, physical abilities, religious beliefs, political affiliation and emotional reaction. Emotional intelligence (EI) has been defined as the ability to perceive, understand, regulate, and harness emotions in the self and others. How one deals with emotion is one characteristic that varies from culture to culture. Research has shown that EI may be a contributing factor in a moment of truth being considered a failure or success. The purpose of this study was to examine if undergraduate student EI scores change after completing a diversity issues course. Students completed the Assessing Emotions Scale on the first class day. At the conclusion of the 15-week course covering approximately 20 diversity issues concepts students completed the same EI assessment. Paired sampled t-testing was conducted to determine whether mean differences existed when comparing post and pre-course scores. Results of this study suggest that certain components of EI are significantly changed after taking the diversity issues course.     

对弱势群体的现象学解释

现象学的整体与部分、多样性中的同一性、在场与缺席三种形式结构为研究和探讨各种论题提供了方法论意义。弱势群体作为目前重要的话题对象之一,以现象学的哲学思维剖析它的性质、特点,审视它与其他群体之间的关系等等,有助于进一步发现弱势群体自身的结构、特点,揭示它与其他群体合作中多样性因素的存在价值,以为制定科学地、合理地、具有时效性的社会救助方案提供新的思维路径。     

Economic corollaries of personalized recommendations

The impact of recommendation systems (RSs) on the diversity of consumption is not transparent or well understood. Available studies, whether experimental or theoretical, show inconsistent and even opposite results, which manifests as debate in the literature. In this paper, we investigate the impact of two main recommender systems, neural collaborative filtering and deep content filtering, on sales diversity via a randomized field experiment. Our results confirm the capability of recommender engines in increasing or decreasing aggregate sales diversity. Nonetheless, they amplify homogenization and reduce individual-level consumption diversity. In conclusion, our research reconciles seemingly contradict previous findings and illustrates that the design of the RS is the decisive factor in homogenizing or diversifying product sales.     

A meta-analysis of consumer ethnocentrism across 57 countries

The concept of consumer ethnocentrism was introduced more than 30 years ago, and since then it has received keen interest among academic researchers. However, empirical evidence in published studies has been inconclusive and many macro-drivers of consumer ethnocentrism received cursory attention. This study meta-analyses 240 studies from 57 countries and tries to understand the key drivers of consumer ethnocentrism. The results indicate that consumer ethnocentrism is a universal phenomenon and is driven by culture and the interaction of economic and ethnic diversity variables. Challenging popular beliefs, the findings suggest that neither globalization nor economic threats are unconditional drivers of consumer ethnocentrism. Their effects are conditional on cultural values and economic situation. Results provide evidence that multi-ethnic societies tend to be more consumer ethnocentric when the culture of a country is not strong in egalitarianism. Finally, the paper presents evidence that consumer ethnocentrism affects the imports of consumer goods in a country.     

产品多样性对RCEP成员出口贸易的影响研究

2020年签署的RCEP是全球规模最大的自由贸易协定,其成员国的要素差异和产品多样性将在一定程度上推进贸易发展。本文利用生物多样性的概念计算2000-2019年RCEP成员国的产品多样性,并建立多元回归模型研究产品多样性对出口贸易的影响。结果表明:产品多样性对出口额有着负向抑制作用,这种抑制作用在非东盟国家更为显著。进一步的分析表明,由于各国专业于生产某类产品,导致产品多样性下降,但专业化又推动出口贸易的发展,从而使两者负相关。基于此,本文提出了创新贸易方式,打造对外贸易新高地,推动产业链价值链合作等促进RCEP成员国贸易发展的对策建议。     

提升算法对传统车险索赔频率建模模型的改进——基于我国五省交强险保单数据

广义线性模型作为非寿险定价的经典模型,在非寿险定价中得到了广泛的应用。近年来,以提升算法为代表的机器学习算法在保险领域取得了很好的效果,为保险产品定价提供了一种新的选择。本文将提升算法思想分别融入到回归树模型和广义线性模型(GLM)中去,用得到的新模型对我国车险索赔频率进行预测建模分析,并与传统的回归树模型和GLM进行比较。结果表明,加入提升算法后传统车险索赔频率建模模型的效果得到了很大的改善,并且在不存在过拟合的前提下,随着模型深度和迭代次数的增加,模型的效果也在不断优化。