美国次级贷款危机的启示

目前,美国次贷危机已经成为了世界各国共同关注的焦点问题.次贷危机之所以备受瞩目,是因为它不仅会影响到美国经济的走向.而且会影响到全球经济的走向.更为重要的是.次贷危机还给我们提供了一个鲜活的案例,那就是危机之所以发生,是因为没有很好地防范危机.当前,我国的金融状况与美国发生危机前的背景非常相似.因此充分汲取次贷危机所带来的经验教训,及时防范和化解潜在的金融风险是我国管理部门的当务之急.     

简支组合箱梁在横向对称荷载作用下的解析解及剪力滞研究

对于上下翼缘宽度都较大的钢-混凝土组合箱梁,分别考虑了钢梁底板、混凝土顶板和悬臂板由剪力滞效应引起的纵向翘曲,以及钢梁与混凝土板之间的相对滑移,在线弹性阶段采用位移叠加的概念,根据能量变分原理建立了钢-混凝土简支组合箱梁平衡微分方程,得到了均布荷载和集中荷载作用下的应力和挠度的解析解,并将解析解与试验结果及ANSYS软件的计算结果进行了相互验证.通过对组合梁荷载效应的参数研究,发现剪滞效应和钢梁与混凝土板之间的滑移效应存在耦合关系,滑移效应的增大使剪滞效应缓解,但使滑移变形和组合梁的挠度增大.结果还表明,不同荷载类型所产生的剪滞系数沿梁轴的分布有明显差别.     

宏观投资效益评价指标体系研究及实证分析

本文根据宏观投资活动中的投入产出关系,建立了以GDP为核心的宏观投资效益评价指标体系和以因素分析、边际分析和弹性分析为内容的评价方法体系,并据此对“八五”以来我国固定资产投资的宏观效益进行初步分析。     

Better job prospects or an imperative to ‘just work’? A cross-national study on social investment and women's employment

Social investment policies advocate for more and better jobs by supporting families' work-life balance and investing in human capital. But do they really help to boost employment prospects for women? Earlier literature suggests a positive relationship, but not enough attention has been paid to the type of employment, or to who the actual beneficiaries of these measures are. This article combines ISSP survey data with OECD and national data in a multilevel analysis to determine whether social investment policies benefit female employment, improve job prospects, and apply to all women irrespective of their educational level. We find that training and childcare policies are associated with higher employment levels, however, the claim that social investment increases chances for better job prospects finds little empirical support. These findings suggest that active labour market and childcare policies are associated with more women's employment, but they might still be following a push to ‘just work’.     

Bayesian nonparametric clustering for large data sets

We propose two nonparametric Bayesian methods to cluster big data and apply them to cluster genes by patterns of gene–gene interaction. Both approaches define model-based clustering with nonparametric Bayesian priors and include an implementation that remains feasible for big data. The first method is based on a predictive recursion which requires a single cycle (or few cycles) of simple deterministic calculations for each observation under study. The second scheme is an exact method that divides the data into smaller subsamples and involves local partitions that can be determined in parallel. In a second step, the method requires only the sufficient statistics of each of these local clusters to derive global clusters. Under simulated and benchmark data sets the proposed methods compare favorably with other clustering algorithms, including k-means, DP-means, DBSCAN, SUGS, streaming variational Bayes and an EM algorithm. We apply the proposed approaches to cluster a large data set of gene–gene interactions extracted from the online search tool “Zodiac.”

     

中西方传统政治思维的路径比较

本文试图在总结中西方传统政治思维的基础上,对中西方政治思维的不同的路径进行比较研究,从而得出一些有益的启示。     

青年员工创业行为中社会资本与创业能力研究

对中小型创业企业青年员工的调查发现,社会资本正向显著影响青年员工创业能力,各维度指标的作用效应大小不同,创业资源拥有量特别是非正式资源拥有量作用突出。资源运用能力正向调节社会资本对创业能力的驱动过程,并对反映社会资本影响创业能力的过程起到明显的促进作用,表明了"社会资本—创业能力"这一创业行为驱动过程中的内在作用机理,即青年员工的"资源运用能力"会在这一过程中发挥正向调节功能。     

Inference for probability of selection with dependently truncated data using a Cox model

A truncated sample consists of realizations of two variables L and T subject to the constraint L < T. One simple solution to dependently truncated data is to take L as a covariate of T in the Cox model. We aimed at studying the probability of selection, P(L < T), in this framework. We proposed the point estimator and derived its asymptotic distribution. Both truncated-only data and censored and truncated data were generated in the simulation study. The proposed point and variance estimators showed good performance in various simulated settings. The bone marrow transplant registry data were analyzed as the illustrative example.     

A Century of Nonprofit Studies: Scaling the Knowledge of the Field

This empirical study examines knowledge production between 1925 and 2015 in nonprofit and philanthropic studies from quantitative and thematic perspectives. Quantitative results suggest that scholars in this field have been actively generating a considerable amount of literature and a solid intellectual base for developing this field toward a new discipline. Thematic analyses suggest that knowledge production in this field is also growing in cohesion—several main themes have been formed and actively advanced since 1980s, and the study of volunteering can be identified as a unique core theme of this field. The lack of geographic and cultural diversity is a critical challenge for advancing nonprofit studies. New paradigms are needed for developing this research field and mitigating the tension between academia and practice. Methodological and pedagogical implications, limitations, and future studies are discussed.     

A two-phase algorithm for bin stretching with stretching factor 1.5

Online Bin Stretching is a semi-online variant of bin packing in which the algorithm has to use the same number of bins as an optimal packing, but is allowed to slightly overpack the bins. The goal is to minimize the amount of overpacking, i.e., the maximum size packed into any bin.We give an algorithm for Online Bin Stretching with a stretching factor of 1.5 for any number of bins. We build on previous algorithms and use a two-phase approach. However, our analysis is technically more complicated and uses amortization over the bins with the help of two weight functions.