Two‐dimensional mental health and related predictors among adolescents in Korea

This study examined whether the factor structure of mental health consists of two dimensions (positive and negative mental health) and whether the two dimensions are associated with different predictors. For this purpose, data from the 471 adolescents who participated in the 2012 Children Supplementary Survey of Korean Welfare Panel Study were used. Confirmatory factor analysis indicated that the two‐factor correlated model fits the data significantly better than the one‐factor model. Multivariate analyses revealed that factors associated with positive mental health differ from factors associated with negative mental health. These findings suggest that mental health professionals should consider the dual structure of subjective well‐being and suicidal ideation in the process of assessment and intervention.     

Contextualizing the Education Effect on Women's Employment: A Cross‐National Comparative Analysis

The authors examine how and why the effect of education on women's employment varies cross‐nationally. First, they present a theoretical model that (a) outlines the micro‐level mechanisms underlying education effects on women's employment in the couple context and (b) proposes contextual moderators at the country level. Second, they test the theoretical model against survey data from the United Nations' Generations and Gender Programme for 5 European countries (Austria, France, Germany, Hungary, and Norway). The data comprise 10,048 educationally homogamous heterosexual couples involving a woman age 20–45. The results indicate that more highly educated couples are more likely to have dual‐earner arrangements in each country, yet the strength of education effects varied substantially between countries and across the family life cycle. In contrast to prior work, the authors find that education effects are not generally smaller in countries that are supportive of women's employment. This relation holds only for later child‐rearing phases.     

上海外来劳动力的定居趋势与融合策略思考

从基本生存状态、对城市的文化和心理认同、定居意愿等方面来考察,在沪外来劳动力在上海定居的态势可以确认。融合外来劳动力,是上海城市持续发展的需要,也是全国城乡一体化协调发展的需要。应综合考量外来人口的融入意愿、融入能力,以及城市发展的接纳动机、接纳条件,按照"小幅度、持续化、结构性"的原则,实行部分优先性融合和全面基础性融合相结合,逐步解决新二元结构问题。     

新英雄主义与萧军文学创作

新英雄主义本质上是带有萧军专属烙印的革命英雄主义,是萧军思想性格的核心概括。新英雄主义在生活中凝结为萧军抵御外来侵袭的掩心甲,在文学上则固化成独特的文学风格。从萧军的小说和散文中可以清晰地看到毛泽东文艺思想和鲁迅精神对萧军创作的影响,以及新英雄主义的发展轨迹。     

The age-varying effects of adolescent stress on impulsivity and sensation seeking

Adolescence is defined in part by heightened exposure and sensitivity to stressors. In a longitudinal cohort of youth at risk for substance use problems, we examined the age-varying relationship between stress exposure and traits that are central to the dual systems model. The positive associations between stress exposure, impulsivity, sensation seeking varied as function of age. Specifically, the influence of stress exposure on impulsivity strengthened during early adolescence and remained stable into early adulthood, while the influence of stress exposure on sensation seeking strengthened from early- to mid-adolescence and weakened thereafter. These findings suggest that the maturational imbalance between the capacity to regulate impulsive tendencies and sensation seeking may be exaggerated for youth who are exposed to a high number of stressors.     

论东北地区经济二元性的"异化"特征

文章采用定性分析和定量分析相结合的方法,以东北地区第一产业就业比重显著上升为切入点,从动态角度论证了我国目前经济发展结构的典型"二元经济"特征,分析了东北老工业基地经济结构与"二元经济"论和全国经济发展的"异化"趋势,认为劳动边际收益率的变化特征是异化的主要原因,并且认为东北经济的"异动"趋势不仅不会成为制约东北经济现代化的关键性障碍,反而将成为东北振兴的"驱动因素".     

基于双重抽样框的二阶段抽样调查方法研究

由于被调查对象的频繁变动,单一抽样框很难覆盖所有的目标单位。为了克服单一抽样框覆盖不完全的缺陷,在各阶段抽样调查采用双重（或多重）抽样框是一种有效的办法。对双重抽样框下的二阶段抽样估计方法进行了研究,得出简单随机抽样下的总体总值估计及其估计量方差,并利用拉格朗日函数求出双重抽样框重叠部分的最优抽样权重系数及各抽样阶段不同子域的样本容量,分析结果可为实际部门在双重抽样框下进行二阶段抽样调查提供相关的理论基础。     

存在信息更新时的双源采购和后备生产结合策略研究

在现实的采购运作中,双源采购和后备生产是两种最常见的风险应对策略。本文在考虑信息更新的情况下,探讨了一个两阶段动态采购决策模型：第一阶段,制造商向存在供应风险的一个或两个主供应商订货;第二阶段,制造商根据主供应商风险信息的更新,决定是否向供应可靠但价格较高的后备供应商订货。本文得到了两阶段的最优采购策略,分析发现,当固定采购成本较低时：若潜在市场需求较小,双源采购将排斥后备生产;若潜在市场需求较大,双源采购和后备生产共存;若潜在市场需求适中,后备生产可能排斥双源采购,两者也可能共存。特别地,在潜在市场需求适中时,可靠性改进概率的增大或后备供应商生产成本的降低,将使后备生产趋于排斥双源采购;反之,可靠性改进概率的减小、固定采购成本的降低或后备生产成本的增加,将使两者趋于共存。     

考虑退货风险的制造商双渠道供应链定价决策研究

针对事前不确定性导致的退货问题,从消费者行为出发,建立考虑定价差异和退货风险双重因素的市场需求函数,通过Stackelberg博弈模型研究四种不同市场需求情形在不同定价模式下双渠道供应链的最优决策。在数值仿真部分,对不同情形决策之间比较、供应链收益进行比较分析。研究表明：电子渠道销售价格与电子渠道的市场基本需求成正比,批发价和传统渠道销售价格与传统渠道的市场基本需求成正比,实体店体验服务水平和传统渠道的市场基本需求的关系（线性关系）则根据某些条件而定;退货风险对供应链决策的影响与定价模式、市场需求影响因素相关;制造商偏好于定价不相等模式,零售商偏好于定价相等模式;退货风险与定价差异对供应链成员收益的影响与定价模式相关,对整体供应链收益的影响与定价模式和退货率大小有关。     

Channel Conflict and Coordination in the E‐Commerce Age

A number of factors, including developments in Internet‐based commerce and third‐party logistics, have led many companies to consider engaging in direct sales. Such a company may at once be both a supplier to and a direct competitor of any existing reseller partners (e.g., land‐based retailers), which can result in “channel conflict.” This can have momentous implications for distribution strategy. To generate managerial insights into this important issue, we develop a model that captures key attributes of such a setting, including various sources of inefficiency. We examine these in detail and identify a number of counterintuitive structural properties. For instance, the addition of a direct channel alongside a reseller channel is not necessarily detrimental to the reseller, given the associated adjustment in the manufacturer's pricing. In fact, both parties can benefit. Finally, we examine ways to adjust the manufacturer‐reseller relationship that have been observed in industry. These include changes in wholesale pricing, paying the reseller a commission for diverting customers toward the direct channel, or conceding the demand fulfillment function entirely to the reseller. The latter two schemes could be mutually beneficial in that they achieve a division of labor according to each channel's competitive advantage.