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.     

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.     

The empirical analysis of the -bilateral optimized combinatorial auction model

This study proposes a new and highly efficient dynamic combinatorial auction mechanism—the N-bilateral optimized combinatorial auction (N-BOCA). N-BOCA is a flexible iterative combinatorial auction model that offers more optimized trading for multiple suppliers and purchasers in the supply chain than one-sided combinatorial auction. We design the N-BOCA model from the perspectives of market architecture, trading rules, and decision strategy for winner determination, the decision strategy for winner determination needs flexible optimization modeling capability. Thus rule-based reasoning was applied for reflecting the flexible decision strategies. We also show the viability of N-BOCA through Paired Samples T-test experimentation. It shows that N-BOCA yields higher purchase efficiency and effectiveness than the one-auctioneer to multi-bidders (1-to-N) combinatorial auction mechanism.     

中美家庭结构与功能的比较分析

本研究聚焦于中美家庭结构和功能的异同以及文化力量的影响,利用美国社会工作学生访华计划设计了本研究课题,在中美双方老师的共同督导下,9名美国社会工作学生和18名中国社会工作学生参与了本课题研究,采用了面对面的深度访谈和观察的方法.比较了中美家庭在家庭结构、家庭决策、家庭沟通及家庭观念等方面的异同,并探讨了其中的文化影响力和对社会工作介入的启示.     

Bidirectionality in kindergarten children's school readiness and emotional regulation

This study examined the longitudinal associations of emotional regulation and school readiness among Chinese kindergarten children. Data were collected from 523 children (mean age at time 1 = 52.42 months; 52.9% male) at two time points separated by approximately 1 year in Hong Kong, China. At times 1 and 2, children's school readiness was assessed by their teachers and parents while their emotional regulation was directly tested. Teachers also rated children's emotional regulation at both time points. The results from the two reciprocal path models showed that, controlling for the corresponding autoregressive effects, school readiness at time 1 was predictive of emotional regulation at time 2. However, emotional regulation at time 1 did not emerge as a significant predictor of school readiness at time 2. Theoretically, these results underscored children's school readiness as a potential contributor to their emotional regulation. Practically, these findings suggested the utility of supporting children's school readiness to foster their emotional regulation.