Up or Out—or Stay Put? Product Positioning in an Evolving Technology Environment

When the development cycle for a product is longer than the development cycle for a core technology that is embedded in it, designers may need to modify the product̂s design to avail of upgrades in this core technology. We model optimal product positioning with regard to technology choice in this setting, using a stochastic dynamic programming framework. Under fairly general assumptions, we find that there are three possible optimal actions: to abandon the project, to maintain the current technology, or to reposition so as to use the best technology currently available. We characterize the optimal positioning sequence in different design environments, discussing throughout the practical implications of our model. Previous research and conventional wisdom suggest early finalization of product specifications if design flexibility is decreasing over time. In contrast, we find that in some design environments, repositioning late in the development cycle can be optimal.     

Bayesian comparison of diagnostic tests with largely non-informative missing data

This work was motivated by a real problem of comparing binary diagnostic tests based upon a gold standard, where the collected data showed that the large majority of classifications were incomplete and the feedback received from the medical doctors allowed us to consider the missingness as non-informative. Taking into account the degree of data incompleteness, we used a Bayesian approach via MCMC methods for drawing inferences of interest on accuracy measures. Its direct implementation by well-known software demonstrated serious problems of chain convergence. The difficulties were overcome by the proposal of a simple, efficient and easily adaptable data augmentation algorithm, performed through an ad hoc computer program.     

西部大开发以来地方政府政策演进及绩效评价

地方政府在区域经济发展中扮演着重要的角色,发挥着积极的作用．在西部大开发中应充分利用地方政府优势,促进区域协调发展。在西部大开发战略实施十周年之际,从西部大开发的提出背景出发,通过对地方政府在西部大开发中角色定位的研究,对十年来西部大开发中地方政府的政策进行回顾和梳理,并对其绩效予以评价。     

Undercounting Medicaid Enrollment in Maryland: Testing the Accuracy of the Current Population Survey

The U.S. Census Bureau’s Current Population Survey is the most commonly cited source for estimates of the insurance status of Americans, but there are concerns that the data may undercount participation in public programs such as Medicaid. Such a Medicaid undercount may result from survey respondents not acknowledging Medicaid coverage because they are unaware that they are enrolled in Medicaid, because they have not recently received health services, due to the stigma associated with receiving public assistance programs, or due to simple recall bias. This paper estimates the extent to which the Current Population Survey undercounts Medicaid participation in a single mid-Atlantic state, Maryland. We administered the Current Population Survey questionnaire to a random selection of known Medicaid participants. We find evidence that the Current Population Survey significantly undercounts Medicaid participation in Maryland and that much of the undercount could be corrected if the survey better identified the Maryland Medicaid program. We also find that recall bias may contribute to the undercount as well. There was no indication that stigma contributed to any undercount. Though not an aim of this study, we find that the Medicaid undercount may contribute to an over count of the number of uninsured.

Positioning,strategizing, and charming: how students with autism construct identities in relation to disability

Contrary to views that young people with the label of autism are incapable of engaging in collective cultural practice, this article examines how they construct identities through social interactions to belong, compete, and participate. In a multi-sited ethnography of high school students with disabilities, we focused on two students as they move across contexts of school, debate team, and home. Over two years of interviews and participant observation, these students demonstrated nuanced efforts to distance themselves from the ‘autistic’ label. These acts of positioning illuminated how they negotiate identities with the knowledge their interactions shape how people perceive their participation in different contexts. By following them across informal and formal environments, we could see how they transition across multiple social worlds and appreciate the combined power these contexts have on youth identity.     

准备时间和语言水平对中国学生写作准确性的影响

通过分析20名高水平非英语专业大学生和20名低水平非英语专业大学生在有、无准备时间的条件下完成一项图片写作任务中的文字材料,考察了准备时间和语言水平对中国学生写作表达的准确性的影响。研究发现,准备时间和语言水平对写作表达的准确性均具有显著影响;准备时间和语言水平无交互效应。     

Equal or individual treatment: contesting storylines in needs assessment conversations within Swedish eldercare

This article examines the role of care managers and their work in putting policy into practice in micro-interactions with older people in Swedish eldercare. The care managers assess the individual needs of older people, and decide what type of social care and services will be given. Dilemmas in care management are often related to the gap between needs and resources. The aim was to study the positioning of care managers within different storylines advanced in needs assessment conversations. Positioning theory was applied to study discursive practices and discursive strategies within Swedish eldercare. Audio-recorded needs assessment conversations among care managers, older people and their relatives at care planning meetings in connection with hospital discharge were analyzed. Two overall positions were identified for care managers—as ‘professional experts’ and as ‘organizational representatives’—allowing the care managers to maneuver within two contesting storylines: ‘distribution of scarce eldercare resources based on the principles of eligibility and equal treatment’ and ‘older people entitled to eldercare according to their own perceived individual needs’. For social work, the results showed the importance of discussing how care managers might move towards exercising greater professional autonomy, becoming less dependent on their position in the organization.     

The influence of the interviewing style and the historical context on positioning shifts in the narrative of a Second World War Resistance member1

This article involves a study of the narrative of a Second World War Resistance member by means of an interview in which the interviewer explicitly inserts the historical context by selecting the topics for discussion and asking critical questions. The interview deals with three periods: the Wartime period; the First Wave of Reprisals; and the Second Wave of Reprisals. The analyses show that the interviewee's first and second‐level positionings shift along with changes in historical period and that they mirror the general historical image of the Resistance. These different positionings are highly consistent in themselves and this consistency is also present on the third level of positioning, because of the interviewee's fairly muted style of narrating, by which blatant inconsistencies are avoided and a general, ‘good’ identity is constructed. The article also demonstrates that the interview style adds another, important dimension to the analysis of identities in life stories.     

区域旅游产业定位研究综论

对区域旅游产业定位研究的起源、意义、进展、主要观点以及相关研究做了论述,并分析了研究中存在的难点,提出进一步研究的必要性和可能方向。     

No risk,no fun: implications for positioning of online casinos

This study uses textual content analysis of online casinos to provide insights into how operators position themselves in the market. Qualitative data from the About Us pages of 19 online gambling websites is gathered and analysed using DICTION software. The resulting z-scores are further analysed using the Hierarchical Clustering on Principal Components (HCPC) function in the FactoMineR software package. Results indicate that the casinos investigated group into three distinct and meaningful clusters (activity/realism; low certainty; high certainty). The results confirm that this exploratory methodology, which combines computerized lexical analysis using DICTION and HCPC, is able to identify positioning differences. In addition, the presence of a relationship between identified clusters and casino rankings is also considered. Its confirmation suggests that casinos that emphasize risk (low certainty) are more likely to obtain higher rankings. The Web has provided a platform for a global online gambling industry where differentiation and positioning is crucial. Therefore, managers need to emphasize in their online and offline communication the often-held perception that one of the attractions of gambling is the thrill or excitement of beating the odds. Limitations are noted and possible areas for further research are indicated.