An adaptive-to-model test for partially parametric single-index models

Residual marked empirical process-based tests are commonly used in regression models. However, they suffer from data sparseness in high-dimensional space when there are many covariates. This paper has three purposes. First, we suggest a partial dimension reduction adaptive-to-model testing procedure that can be omnibus against general global alternative models although it fully use the dimension reduction structure under the null hypothesis. This feature is because that the procedure can automatically adapt to the null and alternative models, and thus greatly overcomes the dimensionality problem. Second, to achieve the above goal, we propose a ridge-type eigenvalue ratio estimate to automatically determine the number of linear combinations of the covariates under the null and alternative hypotheses. Third, a Monte-Carlo approximation to the sampling null distribution is suggested. Unlike existing bootstrap approximation methods, this gives an approximation as close to the sampling null distribution as possible by fully utilising the dimension reduction model structure under the null model. Simulation studies and real data analysis are then conducted to illustrate the performance of the new test and compare it with existing tests.     

交通基础设施对区域经济增长的空间溢出效应研究

文章利用探索性空间数据分析方法,发现2000-2014年我国区域经济发展存在显著的空间集群趋势以及正向空间自相关.利用2000年、2007年和2014年31个省份的数据,实证检验交通基础设施对区域经济增长的空间溢出效应.研究表明:资本、劳动力仍是区域经济增长的首要驱动要素,人力资本、政府支出、贸易开放度和交通基础设施发挥积极的协同作用.交通基础设施对区域经济增长的直接效应在总效应中仍占绝对优势,而传统研究未考虑空间溢出效应则将高估交通基础设施对经济增长的直接效应.     

Can the minimum living standard guarantee scheme enable the poor to escape the poverty trap in rural China?

The rural Minimum Living Standard Guarantee (Dibao) Scheme is the most important social assistance programme in rural China. However, how the rural Dibao programme affects household expenditures and whether it can enable the poor to escape the poverty trap are questions that remain largely unexplored. This study used data from the 2012 Rural Household Survey in China to investigate the impact of the rural Dibao programme on household expenditures. We found that the programme significantly improved the well‐being of low‐income households. Particularly, the programme significantly increased household expenditures on housing, education and health; furthermore, the impact was greater for households with educated household heads. However, the programme did not significantly affect household expenditures on food, transportation or farming inputs. The results imply that participation in the rural Dibao programme induces household investment in human capital, which could help to break the inter‐generational transmission of poverty and raise long‐run welfare.     

Family Relationships,Social Connections,and Depressive Symptoms Among Chinese Older Adults in International Migrant Families

This study explored whether and how family relationships and social connections influence depressive symptoms of older migrants and older adults in transnational families using the data gathered from a cross-sectional survey in Los Angeles, California, United States, and Beijing, China. Regression results showed that the older migrants reported significantly higher levels of depression than the elders in transnational families. The findings highlight the importance of maintaining close family relations and having large friendship networks for older adults in international migrant families.     

Variable selection in partially linear additive models for modal regression

Based on B-spline basis functions and smoothly clipped absolute deviation (SCAD) penalty, we present a new estimation and variable selection procedure based on modal regression for partially linear additive models. The outstanding merit of the new method is that it is robust against outliers or heavy-tail error distributions and performs no worse than the least-square-based estimation for normal error case. The main difference is that the standard quadratic loss is replaced by a kernel function depending on a bandwidth that can be automatically selected based on the observed data. With appropriate selection of the regularization parameters, the new method possesses the consistency in variable selection and oracle property in estimation. Finally, both simulation study and real data analysis are performed to examine the performance of our approach.     

Vocational Experiences and Quality of Life of Migrants: Overview and Future Research

Quality of life is a complicated concept that has attracted broad attention from multiple disciplines. This article introduces a set of studies that employ diverse approaches to explore how work, vocational, and career experiences shape quality of life among migrants, and proposes a future agenda to extend this stream of research. Specifically, operationalizing quality of life in different ways, research showcased in this special issue has demonstrated how international and intranational migrants achieve, maintain, and enhance their well-being in different life domains. Reflecting on the literature and the showcased studies, this article proposes that future research should advance the current inquiry by better categorizing vocational experiences, uniquely operationalizing of quality of life in migration contexts, taking a more culturally sensitive perspective, and broadening methodological approaches.     

教育与娱情:中外戏剧价值论永恒的内部角力——以曹禺剧作批评史为中心

“戏剧何为”是曹禺剧作的批评者共同关注的焦点问题之一.耐人寻味的是,在不同历史阶段,研究者们于曹剧的思想价值与艺术价值之间总是有意无意地突出一方而非等而视之——要么肯定一方而否定另一方,要么将一方视为另一方的附属产品.这一现象首先与曹禺在个人创作倾向和时代、社会要求的冲突中所生发的价值犹疑有关——作者在“教育”和“娱情”两大功能之间的摇摆直接导致了其剧作价值倾向的模糊.更进一步说,由于戏剧自身的艺术特性及其不同于其他文类的受众特征,“教育”和“娱情”之间的角力始终潜隐于古今中外戏剧价值论内部,曹剧中两大功能之间的“暗斗”恰是其具体表现之一.     

“沧浪之水”今何在?——文化生态系统视域下的文化生成、传播与实证研究

文化生态系统是特定文化生成、发展和传播的基础.文化内在的“生成性”特征决定了文化生成、发展和传播的基本规律.文化是特定“时间-历史”情境中的主体不断建构的结果,建构形成的“文化”又在新的“时间-历史”情境中得到继承、诠释和传播.纵观以“沧浪之水”为载体、以“有道则出、无道则隐”为核心的“沧浪文化”生成、发展和传播全过程, “沧浪文化”从文化的原始生长点出发,早期为扩展扩散,后期为迁移扩散;经由地理表征“升华”到经典文化中,又从经典文化“落实”到地理表征上的双向互动的生成和反身建构过程.就现实意义而言,不同地域的同类文化之间并非互相排斥而是互相联系、互相支持的关系,绝大多数地理性的“文化正宗”之争可以就此打住.     

Exploration and Firm Performance: The Moderating Impact of Competitive Strategy

In this study we examine the moderating effect of competitive strategy (including differentiation and cost‐leadership strategies) on the relationship between exploration and firm performance. We find that the moderating effect of differentiation strategy is positive while that of cost‐leadership strategy is negative. And, these moderating effects are stronger in a highly competitive context. This study offers an explanation for previous mixed findings on the linkage of exploration to firm performance and enriches the discipline's knowledge regarding the performance implications of exploration. Moreover, we respond directly to the appeal in research on competitive strategy to clarify the role played by competitive strategy in profiting from exploration.     

基于建构主义学习理论的网络课程建设及其应用——以“经济法”课程为例

商科专业＂经济法＂网络课程的建设,应基于建构主义学习理论,以发挥学生学科优势为基础;以培养应用型、复合型人才为目标;遵循内容体系化、模块化原则和知识学习为手段、方法意识为目标原则,在具体应用中采取相应措施。如在网络课堂公布热点案例引起讨论,讲授难点、重点,提出分析问题的思路,创设学习情景,强化实践技能,并与职业考试接轨以拓宽学生的就业渠道等。这样可以保证网络课程的实际应用效果。