批发和零售业在ISIC4.0和NACE2.0中的分类比较研究及启示

 ISIC是世界上对经济活动进行分类的最成熟、最权威、最有影响力的国际标准,而NACE派生于国际标准产业分类体系,是派生型产业分类体系的典型代表。深入了解最新版ISIC4.0和NACE2.0的批发和零售业分类的差别,对我国国民经济行业分类的批发和零售业依据ISIC4.0进行修改和调整具有重要的借鉴价值,同时对正确收集、处理和测算批发和零售业的经济指标以及国际间数据比较至关重要。故本文对上述两大产业分类体系进行比较研究,揭示批发和零售业在上述产业体系中的差别,提出我国国民经济行业分类体系的批发和零售业分类的改进建议。     

It's More Than an M‐shape: The Political Economy of Female Non‐Standard Workers in the Republic of Korea

This study examines the re‐entrance of female workers into the Korean labor market. We highlight that women in their 40s have the highest rate of employment among all female workers and that a large proportion of these women are entering into non‐standard employment. In approaching this question, we examine the political economy of this phenomenon by first discussing the demand side of the Korean labor market using the gendering of the varieties of capitalism argument and then the supply side with the work–life balance argument. When examining re‐entrance into the labor market, women with general skills with lower education and higher education both found it more feasible to re‐enter the labor market as non‐standard workers. While work–life balance is a prominent reason for women's choice of opting out of the labor market, work–life balance choice mattered less for women re‐entering the labor market as non‐standard workers in their 40s and 50s but instead firmly based skill formation mattered more. In addition, the retail service industry is suggested to absorb a large number of female workers with lower skill levels who would have had difficulties in re‐entering other male‐oriented companies.     

关于建立标准人（Standard Person简写SP）体系的假设

人作为生物,也作为社会成员,他们具有不同的个体特征,但同时又具有共同之处,这些共同之处我们可以从人的身体素质、思想素质和科学文化素质等进行比较。标准人体系假设就是试图从这几个重要因素及其子因素对人的影响中确定一个标准人所拥有的条件,以及各因素对标准人的影响权重,也就是对人的条件进行量化,并提出本假设的目的,解决的问题和作者希望通过本假设对社会学、人口学、人类学、人口社会学等学科的研究提供一种新的视角。     

公交车辆在中途站点的排队论分析

公交站台停靠区的排队问题决定了公交车辆的通行能力。把公交中途站台与公交车辆模拟成一个单服务系统、公车到达率 ,两服务率 、 的负指数分布的排队M/M/1/N系统。根据排队论理论,实测计算了北京中关村海淀黄庄、人民大学站点公交车辆排队队长,站内逗留时间等参数。结论为：城市主干道关键站台改造为主、副双公交站台制式以及调整公交线路布设,优化各线路发车频率是花费成本低,畅通成效大的解决站点塞车排队的方法。     

Speculation in Standard Auctions with Resale

In standard auctions resale creates a role for a speculator—a bidder who is commonly known to have no use value for the good on sale. We study this issue in environments with symmetric independent private‐value bidders. For second‐price and English auctions the efficient value‐bidding equilibrium coexists with a continuum of inefficient equilibria in which the speculator wins the auction and makes positive profits. First‐price and Dutch auctions have an essentially unique equilibrium, and whether or not the speculator wins the auction and distorts the final allocation depends on the number of bidders, the value distribution, and the discount factor. Speculators do not make profits in first‐price or Dutch auctions.     

中国城市居民最低生活保障水平分析

以2005年的统计数据为主要依据,通过测算及横向与纵向的比较,对我国城市居民最低生活保障水平进行了分析,目的在于廓清人们对中国目前最低生活保障水平的认识.综合分析表明,尽管在制度设计和具体实施中仍存在缺陷和问题,但保障水平过高肯定不是当前低保制度面临的问题,对低保"养懒汉"的抨击也是一种片面的夸大.     

Estimation of a standard measuring error by repeated measurements and sortings

A sorting-and-measuring machine (SMM) measures and sorts (classifies) on-line produced items into several groups according to their size. The measuring devices of the SMM perceive the actual item size with a random error ε and classify the item as being smaller than b iff z+ε<b. Here ε is a normal zero-mean r.v. with unknown standard deviation σ which is the main parameter characterizing the precision and technical condition of an SMM. The paper gives the following method of estimating σ. N₀ items are measured and N₁ of them are recognized by the SMM as belonging to the group a<z≤b. These N₁ items are sorted again and N₂ of them return to this group, these are sorted again, and so on. The estimation of σ is based on the statistics N_m/N_n. Moments of the ratio statistics N_m/N_n and their distributional properties are investigated. It turns out that the expected value of N_m/N_n depends almost linearly on σ which allows us to construct ‘almost’ unbiased estimators of type $\text{σ}\text{?}{}_{\mathrm{mn}}\text{=A}\textcolor{red}{}\text{N}{}_{\mathrm{m}}\text{/N}{}_{\mathrm{n}}\text{+B}$ with good propert including robustness with respect to the distribution of item size. Convex combinations of $\text{σ}\text{?}{}_{\mathrm{mn}}$ statistics are considered to obtain an estimator with minimal variance.     

An MM Algorithm for Constrained Estimation in a Road Safety Measure Modeling

We model the effect of a road safety measure on a set of target sites with a control area for each site, and we suppose that the accident data recorded at each site are classified in different mutually exclusive types. We adopt the before–after technique and we assume that at any one target site the total number of accidents recorded is multinomially distibuted between the periods and types of accidents. In this article, we propose a minorization–majorization (MM) algorithm for obtaining the constrained maximum likelihood estimates of the parameter vector. We compare it with a gradient projection–expectation maximization (GP-EM) algorithm, based on gradient projections. The performance of the algorithms is examined through a simulation study of road safety data.     

Balancing employees’ extrinsic requirements and intrinsic motivation: A paradoxical leader behaviour perspective

In this paper, we use self-determination theory to examine the benefits of the use of paradoxical leader behaviour (PLB) by supervisors. We posit that PLB can initiate two complementary mechanisms: a top-down mechanism (perception of leaders' legitimate power) that may encourage employees to satisfy and exceed standard performance criteria, and a bottom-up mechanism (employee intrinsic motivation) that stimulates employees to be proactive. We argue that implementing these mechanisms simultaneously may interactively enhance employee creativity. Our study is based on field data collected from a sample of 392 employees and their supervisors. We find that PLB is positively related to employees’ perception of legitimate power and intrinsic motivation. Furthermore, power perception and intrinsic motivation are associated with standard performance and proactive behaviour, respectively, and these mechanisms jointly influence employee creativity. In demonstrating the efficacy of balancing extrinsic requirements and intrinsic motivation, our findings have significant theoretical and empirical implications for employee motivation.     

Hijacking Planes to Cuba: An Up-Dated Version of the Birthday Problem

Modern desk calculators compute distribution functions for many of the standard tabled distributions. Two such machines and some of their capabilities are discussed. Generally more is available from the calculators than is found in voluminous tables. One of the biggest advantages of the machines over tables arises from their capacity to compute probabilities for the two parameter F distribution, a set of values that is cumbersome to tabulate.