The strategic use of Twitter to manage personal public relations

This study examined the effect of personal public relations developed through Twitter on cognitive and attitudinal aspects, particularly focusing on the use of Twitter by CEOs. According to the responses of young consumers who participated in this study, their attitudes toward the use of Twitter by CEOs positively influenced their perception of transformational leadership (H1). Further, perceived transformational leadership was positively associated with attitudes toward CEOs using Twitter; this in turn positively influenced attitudes toward corporations (H2). The positive evaluation of the use of Twitter by CEOs directly influenced attitudes toward such CEOs (H3), whereas attitudes toward such use did not influence attitudes toward corporations. The results indicated that microblogging is beneficial for the development of effective personal public relations by corporate leaders.     

Empirical Bayes confidence intervals shrinking both means and variances

Summary.  We construct empirical Bayes intervals for a large number p of means. The existing intervals in the literature assume that variances     are either equal or unequal but known. When the variances are unequal and unknown, the suggestion is typically to replace them by unbiased estimators     . However, when p is large, there would be advantage in 'borrowing strength' from each other. We derive double-shrinkage intervals for means on the basis of our empirical Bayes estimators that shrink both the means and the variances. Analytical and simulation studies and application to a real data set show that, compared with the t -intervals, our intervals have higher coverage probabilities while yielding shorter lengths on average. The double-shrinkage intervals are on average shorter than the intervals from shrinking the means alone and are always no longer than the intervals from shrinking the variances alone. Also, the intervals are explicitly defined and can be computed immediately.     

Resource Constraints or Cultural Conformity? Nonprofit Relationships with Businesses

Nonprofit interactions with businesses have become increasingly diverse, but which nonprofits establish relationships, and to what extent do relationships depend on the form or type of tie? Focusing on nonprofit collaboration with businesses and donations from businesses, we test arguments based on sociological institutionalism and resource dependence theory. We find that nonprofits relying on earned income, nonprofits led by individuals with management degrees, and rationalized nonprofits all are more likely to report collaborations with businesses, aligning with expectations from institutional theory. For donative ties between businesses and nonprofits, we find that rationalized nonprofits are more likely to have charitable gifts from businesses. However, nonprofits with earned income are less likely to have business donations, and funding diversity has a salient positive effect. These results reveal important but paradoxical institutional and resource dependence effects. We conclude with a discussion of our divergent findings and set an agenda for additional research on the topic.     

The estimation of a corporate crisis communication

This experimental study found a main effect of perceived leadership and an interaction effect of perceived leadership and perceived severity of threats on the public's estimation of organizational crisis responses. The results indicate that the contingent theoretical argument explaining the dynamics of organizational factors and situational factors that determine stance taken by public relations practices can also be applied when explaining the outside latent public's thought patterns predicting an organizational stance and message strategy. Contingency theory offers predictive power, not just for the practitioner, but for the public passing judgment on the stance taken by an organization.     

Newspaper Coverage of Christianity in South Korea, 1996–2005

This study analyzes a sample of 2,614 news articles dealing with religions published in Chosun Ilbo from 1996 to 2005, focusing on how this major newspaper covered Christianity in terms of its tone and frames. The results show that this religion was portrayed in a neutral or positive manner and that both Protestants and megachurches were mostly considered providers of social work services. These findings have implications for academic, media, and religious sectors.     

Asymptotic optimality of a two-stage procedure in Bayes sequential estimation

The problem of sequential estimation of the mean with quadratic loss and fixed cost per observation is considered within the Bayesian framework. Instead of fully sequential sampling, a two-stage sampling technique is introduced to solve the problem. The proposed two-stage procedure is robust in the sense that it does not depend on the distribution of outcome variables and the prior. It is shown to be asymptotically not worse than the optimal fixed-sample-size procedures for the arbitrary distributions, and to be asymptotically Bayes for the distributions of one-parameter exponential family.     

An unexpected meeting of four seemingly unrelated problems: graph testing, DNA complex screening, superimposed codes and secure key distribution

This paper discusses the relation among four problems: graph testing, DNA complex screening, superimposed codes and secure key distribution. We prove a surprising equivalence relation among these four problems, and use this equivalence to improve current results on graph testing. In the rest of this paper, we give a lower bound for the minimum number of tests on DNA complex screening model. The first and second author would like to dedicate this paper to professor Frank K. Hwang on the occasion of his 65th birthday. This research is partially supported by Republic of China, National Science Council grant NSC 92-2115-M-009-014.     

An investigation of predictors of mental health in single men and women experiencing homelessness in three Canadian cities

Homelessness is related to poorer mental health, yet, there is limited understanding of the predictors of mental health of men and women experiencing homelessness. To support service providers in identifying individuals who might be at particular risk of poor mental health, this study investigated the predictors of mental health in 501 single men and women experiencing homelessness in Vancouver, Toronto, and Ottawa, Canada. Data were obtained via in-person, structured interviews. In order to identify whether predictors differ by gender, multiple linear regressions were conducted separately for men and women. Mental health status was measured by the Mental Component Summary score of the 12-item Short-Form Health Survey. Better mental health for men and women was associated with the presence of fewer chronic health conditions and a higher level of social support. An older age, not having experienced a recent physical attack, and absence of a mental health diagnosis were related to better mental health for women. The absence of unmet mental health needs within the past 12 months was associated with better mental health for men. The study highlights differences in factors associated with mental health for men and women. Service providers should be aware of the association of these factors with mental health to guide assessment and service planning.