Multi-arm response-adaptive designs for circular responses

A multi-arm response-adaptive allocation design is developed for circular treatment outcomes. Several exact and asymptotic properties of the design are studied. Stage-wise treatment selection procedures based on the proposed response-adaptive design are also suggested to exclude the worse performing treatment(s) at earlier stages. Detailed simulation study is carried out to evaluate the proposed selection procedures. The applicability of the proposed methodologies is illustrated through a real clinical trial data on cataract surgery.     

Unstructured principal fitted response reduction in multivariate regression

In this paper, an unstructured principal fitted response reduction approach is proposed. The new approach is mainly different from two existing model-based approaches, because a required condition is assumed in a covariance matrix of the responses instead of that of a random error. Also, it is invariant under one of popular ways of standardizing responses with its sample covariance equal to the identity matrix. According to numerical studies, the proposed approach yields more robust estimation than the two existing methods, in the sense that its asymptotic performances are not severely sensitive to various situations. So, it can be recommended that the proposed method should be used as a default model-based method.     

Some new augmented fractional Box–Behnken designs

The augmented Box–Behnken designs are used in the situations in which Box–Behnken designs (BBDs) could not estimate the response surface model due to the presence of third-order terms in the response surface models. These designs are too large for experimental use. Usually experimenters prefer small response surface designs in order to save time, cost, and resources; therefore, using combinations of fractional BBD points, factorial design points, axial design points, and complementary design points, we augment these designs and develop new third-order response surface designs known as augmented fractional BBDs (AFBBDs). These AFBBDs have less design points and are more efficient than augmented BBDs.     

Hybrid tripartite randomized response technique

In this paper, a new randomized response technique has been proposed that combines the unrelated question randomized response technique and tripartite randomized response technique. The relative efficiency of the newly proposed Randomized Response technique over the existing Randomized Response technique was obtained. It was observed that the relative efficiency of the proposed technique over the tripartite RRT increases with increase in π_A and π_U. The applicability of the proposed technique was also shown. However, it has been shown that the proposed technique performs better than the conventional ones.     

Emotional crisis communication

Organizational crises are usually highly emotional experiences for both organizations and stakeholders. Hence, crisis situations often result in emotionally charged communication between the two parties. Despite the attention of organizations and scholars to the emotions of stakeholders during crises, little is known about the effects of the emotions communicated by organizations on corporate reputations. Through the use of vignettes, this experiment reveals that besides crisis-response strategy (diminish vs. rebuild), the communicated emotion (i.e., shame and regret) has a positive effect on corporate reputation. Mediation analyses showed that this effect of communicated emotion could be explained by the public's (negative) affective as well as cognitive responses (i.e., account acceptance). This study confirms that emotional signals embedded in crisis responses may affect corporate reputations by reducing feelings of anger and by increasing the acceptance of the organizational message. In doing so, this study provides a starting point for further exploration of the effectiveness of other emotions in crisis communication.     

韩国青少年校园暴力情况及相关政策

近年来,韩国校园暴力问题凸显,在家庭、学校及社会诸多方面因素的影响下,校园暴力事件呈现出逐年上升的趋势,对青少年身心健康及社会和谐发展造成了极其恶劣的影响。目前,韩国校园暴力的产生呈现出受害青少年心理创伤问题严重、小学高年级校园暴力的发生率极高及校园暴力类型多样化三大特点。为了预防及根治校园暴力,韩国历届政府相继制订并颁布了专项法律条例及各类应对举措。2014年,朴槿惠政府宣布实施"以学校现场为中心"校园暴力应对政策,主要内容包括在校园内开展丰富多样的校园暴力预防活动,根据暴力类型、发生地域以及学生年级的不同而推行有针对性的应对策略等。     

An optimal response adaptive biased coin design with k heteroscedastic treatments

For comparing treatments in clinical trials, Atkinson (1982) introduced optimal biased coins for balancing patients across treatment assignments by using D-optimality under the assumption of homoscedastic responses of different treatments. However, this assumption can be violated in many real applications. In this paper, we relax the homoscedasticity assumption in the k treatments setting with k>2. A general family of optimal response adaptive biased coin designs are proposed following Atkinson's procedure. Asymptotic properties of the proposed designs are obtained. Some advantages of the proposed design are discussed.     

计算机辅助自填式调查中敏感问题数据质量评价

 内容提要：已有的评价敏感问题调查方法的研究主要是通过比较不同调查方法下敏感行为发生率的高低,而运用平均回答问题时间来对敏感问题问卷质量进行评价的研究很少。本研究以2006年《中国人性行为和性关系》调查数据为例,根据平均回答时间来筛选问题样本。并对问题样本对应的被调查者和剩余被调查者的特征进行比较。还对该部分被调查者的自评价和相应地调查员给出的评价进行分析,结果显示问题样本对应的被调查者的特征、自评价以及调查员的评价在一定程度上得到了相互印证。因此根据平均回答时间来进行问题数据的识别是可行的。     

Effects of Varying Response Formats on Self-ratings of Life-Satisfaction

A sample of 1,737 volunteering students, randomly assigned to 12 conditions, rated their current overall (dis)satisfaction with life. Each condition used 1 of 12 response formats, differing in (1) polarity (bipolar versus unipolar), (2) orientation (horizontal versus vertical), and (3) anchoring (−5 to +5, Not Numbered, and 0 to 10). Results For satisfaction ratings, a negative skew was found for all response formats, but, a higher percentage of respondents scored in the upper part (Midpoint to top) of the scale with anchor points (−5 to +5) than on the scales with other anchor points (Not Numbered and 0 to 10). Our results indicate that, satisfaction ratings obtained with either a unipolar or a bipolar response scale were similar, but, participants experienced some difficulty in rating life dissatisfaction using the bipolar dissatisfaction–satisfaction response scale. Moreover, this study has found that life satisfaction and dissatisfaction show a reciprocal relation, especially when assessed with two independent unipolar rating scales. These results support the inclusion of one-way unipolar response scales in the assessment of satisfaction and dissatisfaction. Conclusion Our results suggest that the type of response format may influence both satisfaction and dissatisfaction ratings as well as the relationships between these two constructs.

He said, she said: The gender wage gap according to self and proxy reports in the Current Population Survey

Roughly half the labor force data in the Current Population Survey (CPS) are provided by proxy respondents, and since 1979, men’s reliance on proxies has dropped dramatically while women’s reliance on proxies has increased. Few authors, however, have examined how combining these first-hand and second-hand reports may influence our understanding of long-term economic trends. We exploit the outgoing rotation group structure of the CPS by matching individual records one year apart, and we find that self-reported wages are higher than proxy-reported wages even after controlling for all time invariant characteristics. Furthermore, we find that changes in the use of proxy respondents by men and women since 1979 have made current estimates of the gender wage gap larger than they would have been without changes in reporting status. This suggests that the gender wage gap has closed more than previously estimated. We recommend that researchers combine self and proxy responses with great care, especially when analyzing time trends or making gender comparisons.