Gamma-minimax results for the class of unimodal priors

Olman and Shmundak proved 1985 that in estimating a bounded normal mean under squared error loss the Bayes estimator with respect to the uniform distribution on the parameter interval is gamma-minimax when the parameter interval is sufficiently small and the class of priors consists of all symmetric and unimodal distributions. Recently, one of the authors showed that this result remains valid for quite general families of distributions which satisfy some regularity conditions. In the present paper a generalization to the class of unimodal priors with fixed mode is derived. It is proved that the Bayes estimator with respect to a suitable mixture of two uniform distributions is gamma-minimax for sufficiently small parameter intervals. To that end appropriate characterizations of a saddle point in the corresponding statistical games are established. Some results of a numerical study are presented.     

Do terrorist attacks affect ethnic discrimination in the labour market? Evidence from two randomized field experiments

Terrorist attacks are known to influence public opinion. But do they also change behaviour? We address this question by comparing the results of two identical randomized field experiments on ethnic discrimination in hiring that we conducted in Oslo. The first experiment was conducted before the 2011 terrorist attacks in Norway; the second experiment was conducted after the attacks. In both experiments, applicants with a typical Pakistani name were significantly less likely to get a job interview compared to those with a typical Norwegian name. But the ethnic gap in call‐back rates were very similar in the two experiments. Thus, Pakistanis in Norway still experienced the same level of discrimination, despite claims that Norwegians have become more positive about migrants after the far‐right, anti‐migrant terrorist attacks of 2011.     

Knowledge and perception of female nursing students about human papillomavirus (HPV), cervical cancer,and attitudes toward HPV vaccination

Objective: The researchers aimed to evaluate the knowledge and perceptions of first-year female nursing students about human papillomavirus (HPV), cervical cancer (CC), and HPV vaccination. Participants: The sample included 690 female nursing students from sampled universities between April and June 2015. Methods: Students were surveyed by using a pretested HPV and CC awareness questionnaire. Results: More than half of the students (65.1%) answered questions incorrectly with a mean HPV knowledge score of 6.085?±?3.38. The majority of students (82.6%) did not hear HPV vaccine. Only, 2.8% of the students had been vaccinated. A statistically significant relationship was found between HPV knowledge score and hearing about HPV vaccine (U?=?28280.500, p?=?.015), and believing HPV vaccine protectiveness (χ²?=?14.153, p?=?.001). Conclusions: This study highlights the lack of knowledge and low level of awareness about HPV, CC, and HPV vaccination among first-year nursing college students.     

Markdown Budgets for Retail Buyers: Help or Hindrance?

For many retailers, markdown decisions are taken by retail buyers whose compensation is based on sales revenue so their objective is to maximize it through the season. This implies that the buyers' objectives are not perfectly aligned with the overall profitability the firm. Many retailers set markdown budgets prior to the season to control margin erosion and increase profitability. Markdown budget constrains the buyers on the amount of discounts that they can apply on a given inventory of merchandise and sets a limit on the dollar value of markdowns for the season. While markdown budgets may be useful in preventing excessive discounts, they can have a detrimental effect on the buyers' ability to respond to poor market and remove distressed inventory. We investigate the effectiveness of this practice in aligning the incentives of buyers with that of the firm, and provide guidance on how these budgets should be established ahead of time. We consider a firm with a fixed inventory of a seasonable item, and a single chance to mark the price down. The retailer knows only the demand distribution at the beginning of the season, but the market information is revealed during the season to the buyer. We first characterize the buyer's markdown policy and understand the circumstances under which this can be different from the retailer's markdown policy. We use our model to determine the optimal markdown budget and quantify its effectiveness considering different factors such as the level of demand uncertainty, initial markup, and market's responsiveness to markdowns.     

Cultural Studies and its local resources: discourse and practice in the Rural Reconstruction Movement

ABSTRACT

Emphasis on ‘context’ and ‘practice’ has been the tradition of Cultural Studies. Now Cultural Studies in Mainland China are facing the following difficulties: lack of attention to local issues and thoughts, lack of holistic horizon and sense of history. How can Cultural Studies in Mainland China search out more potential recourse and forces for critique and resistance from modern China and urban–rural China and confront Chinese problems and experiences which are of great complexity, by returning to its unique historical and social context and taking local resources into consideration? We try to return to the long-term engagement in ‘action-writing’ practice in the Rural Reconstruction Movement. Under the unique perspective of ‘practitioner-researcher’, they hope to explore plural spaces veiled by the mainstream and search out, in the historical context of China, local resources for Cultural Studies and possibilities for its advancement.     

机遇挑战创新--大学生网络思想政治教育对策思考

互联网的日益普及 ,既给大学生思想政治教育创造了巨大的机遇 ,蕴藏着丰富的创新契机 ,又带来了严峻的挑战。文章对目前各高等学校开展网络思想政治教育的基本经验进行了初步的分析与总结 ,并以此为基础 ,结合大学生思想政治教育的实际 ,对合肥工业大学开展大学生网络思想政治教育进行了系统的思考     

贫困时代的抵抗和希望：－司马迁和汉代社会关系简论

司马迁及其<史记>构成一个知识社会学事件,因此,只有把司马迁理解为一个具体的个人,<史记>作为总体世界观即历史哲学才能被给予.这构成司马迁与汉代社会关系的核心命题.它可以从三个方面去理解,一是汉代社会的贫困化,二是司马迁诗人形象的确立,最后是<史记>知识学性格的描述.