Newsvendor Pricing Problem in a Two‐Sided Market

We study the pricing problem of a “platform” intermediary to jointly determine the selling price of the platforms (hardware) sold to consumers and the royalty charged to content developers for content (software), when the demands for content and for platforms are interdependent. Our model elucidates the impact of supply chain replenishment costs and demand uncertainty on the strategic issues of platform pricing in a two‐sided market.     

Quality of Life of Residents Living near Industrial Estates in Singapore

Quality of life (QOL) studies are increasinglygaining the attention of urban planners due toits usefulness in assessing and monitoringpublic policies. With this in mind, an attemptwas made in this study to assess the quality oflife of residents staying near industrialestates in Jurong, Singapore using 18subjective life indicators to measure theoverall life satisfaction.Based on a 5-point Likert scale, health (4.48),family life (4.37) and public safety (4.13)emerged as the more important aspects, whileself-development (3.90), religion (3.60) andpolitics (2.74) were named by the respondentsto be among the least important. On thesatisfaction level, public safety (3.92),family life (3.88), and public utilities (3.78)were deemed to be among the most satisfiedaspects, while consumer goods (2.92), politics(2.91) and environment (2.89) were consideredto be among the least satisfied aspects. Therelationship between the different demographicvariables with overall life satisfaction werealso determined and five variables, namely,marital status, education level, occupation,household income and household size were foundto contribute significantly to the overall lifesatisfaction scores.Overall, the residents in Jurong were found tobe generally satisfied with their life, scoringa mean satisfaction rating of 3.687. It ishoped that the data gathered from this studycan be used by planners in formulating andimplementing future policies.     

Life Satisfaction Among University Students in a Canadian Prairie City: a Multivariate Analysis

This article reports the findings from a questionnaire survey of university students’ life satisfaction in Regina. The results demonstrated that a significant proportion of the 315 respondents were satisfied with their lives (N = 240, 76.2%). With regard to degree of satisfaction with different aspects of life, respondents expressed that they were most satisfied with relationship with mother, living environment, relationships with close friends, relationships with siblings, and living arrangement. Multiple ordinary least-squares regression analyses revealed that respondents who indicated a higher socio-economic status, achieveda higher grade point average, and were more satisfied with their academic experience, self-esteem, relationship with significant other, and living conditions, expressed a markedly higher level of satisfaction with life.     

A study on IUD retention by curve-fitting

In order to estimate the demographic impact of IUD, there is a need for estimating IUD retention rates beyond the period of actual observation. This article describes a mixed exponential function for this purpose. With this function of IUD retention, it is possible to estimate the “life expectancy” and “half-life” of an IUD. Another important concept is the “cut-off date”, introduced in estimating the “life expectancy” because in practice no IUD will be worn by a woman forever.     

A slacks-based measure of super-efficiency in data envelopment analysis: An alternative approach

The current paper proposes a slack-based version of the Super SBM, which is an alternative super-efficiency model for the SBM proposed by Tone. Our two-stage approach provides the same super-efficiency score as that obtained by the Super SBM model when the evaluated DMU is efficient and yields the same efficiency score as that obtained by the SBM model when the evaluated DMU is inefficient. The projection identified by the Super SBM model may not be strongly Pareto efficient; however, the projection identified from our approach is strongly Pareto efficient.     

Greedy algorithms for the profit-aware social team formation problem

Motivated by applications in online labor markets, we study the problem of forming multiple teams of experts in a social network to accomplish multiple tasks that require different combinations of skills. Our goal is to maximize the total profit of tasks that are completed by these teams subject to the capacity constraints of the experts. We study both the offline and online settings of the problem. For the offline problem, we present a simple and practical algorithm that improves upon previous results in many situations. For the online problem, we design competitive deterministic and randomized online algorithms. These are complemented by some hardness results in both settings.

     

继承与发扬季羡林学术遗产进一步加强对中印文化的研究

我们加强对中印文化的研究,要学习季老深入钻研东方智慧宝库的精神,把他启动了的研究专题继承发扬,特别是对他所说的中印关系是“天设地造”;如果没有中印文化交流,中国和印度都不会发展成今天这个样子;以及“三十年河东、三十年河西”作更深刻的探讨。本文对这三个论点提出些初步看法。     

Promotions and the pattern of grocery shopping time

The histograms of interpurchase times for frequently purchased packaged goods have consistently shown pronounced seven-day cycles. Evidence supports that the weekly spike phenomenon is the result of consumers' regular shopping trip schedules. We explore the implications of this peculiar regularity on the issue of consumer purchase timing acceleration. Data for five product categories are examined. Promotions are found to have little effect in accelerating purchase timing. In contrast, conventional interpurchase time models are shown to overstate the effect of promotions.     

企业战略、人力资源管理系统与企业绩效的关系研究

有关战略人力资源管理的研究认为,企业通过人力资源实践活动之间的契合,及它们与企业目标之间的契合,可以获得高附加值、稀缺性、难以模仿和不可替代的竞争优势。本研究采用形态理论的方法探讨人力资源管理实践组合与企业战略之间的最佳契合模式.研究发现,不仅企业战略对人力资源实践组合有显著影响,而且人力资源管理系统与企业战略的交互作用对企业利润和销售额增长率也有显著影响。本研究的结论在一定程度上支持了人力资源管理系统与企业战略的交互作用有助于提升企业绩效的观点。