Social Amplification of Risk in the Internet Environment

This article analyzes the dynamic process of risk amplification in the Internet environment with special emphasis on public concern for environmental risks from a high‐speed railway tunnel construction project in South Korea. Environmental organizations and activists serving as social stations collected information about the project and its ecological impact, and communicated this with the general public, social groups, and institutions. The Internet provides social stations and the public with an efficient means for interactive communication and an open space for active information sharing and public participation. For example, while the website of an organization such as an environmental activist group can initially trigger local interest, the Internet allows this information to be disseminated to a much wider audience in a manner unavailable to the traditional media. Interaction among social stations demonstrates an amplifying process of public attention to the risk. Analyses of the volume of readers’ comments to online newspaper articles and public opinions posted on message board of public and nonprofit organizations show the ripple effects of the amplification process as measured along temporal, geographical, and sectoral dimensions. Public attention is also influenced by the symbolic connotations of risk information. Interpretations of risk in religious, political, or legal terms intensify public concern for the environmental risk.     

Integrity's place among the character strengths of middle-level managers and top-level executives

One purpose of this study was to extend integrity research in organizations into the ranks of middle management. We therefore examined whether middle-level managers' behavioral manifestations of integrity related to ratings of their performance. Results of hierarchical regression analysis indicated that direct report ratings of a middle-level manager's integrity were positively related to boss ratings of that manager's performance. A second purpose of this study was to understand differences in integrity's relative importance to performance among other character strengths, and as a function of context (e.g., managerial level). We extend research in this area by showing, through relative weight analysis, that integrity was relatively less important to middle-level managers' current performance compared to other character strengths (e.g., social intelligence). In contrast, integrity was relatively more important for the performance of top-level executives — roles middle-level managers may hold in the future. Implications of these results for future research and practice as well as the current study's limitations are discussed.     

On inference for mean residual life

In this paper, we propose a smooth nonparametric estimator of mean residual life based on a randomly censored sample. Large sample properties of the proposed estimator are examined. Also we study the asymptotic relative efficiency for different members in the family of test statistics, proposed by Lim and Park(1998), for testing whether or not the mean residual life changes its trend, and we discuss the efficiency values of loss due to censoring. Monte Carlo simulations are conducted to illustrate the performance of our estimation and investigate the performance of test statistics by the power of tests.     

Psychological empowerment and organizational commitment: the moderating effect of organizational learning culture

This paper examines the influence of psychological empowerment on organizational commitment and the moderating effect of organizational learning culture on the relationship. The results suggest that psychological empowerment, organizational learning culture, and demographic variables had a significant impact on organizational commitment for employees in the public sector of Korea. Employees showed higher organizational commitment when they perceived high psychological empowerment and a high organizational learning culture. In addition, the moderating effect of organizational learning culture on the relationship between psychological empowerment and organizational commitment was found to be significant. Among the demographic variables, only educational level turned out to be significant. Finally, implications, limitations and research recommendations are discussed.     

The effects of adoption disclosure on the adaptation of Korean adoptive families

The main goal of this study is to examine the effects of adoption disclosure on the adaptation of Korean adoptive families using a two stage equation model. The results of this study indicate that there is a self-selection bias between disclosed and closed adoptive families. Yet, even after considering this selection bias, adoption disclosure was associated with the positive outcomes of adoptive families. Also, the estimates in the treatment effect model were found to be very similar to those of the regression model, indicating that the degree of self-selection bias between these groups was not so strong as to distort the effects of adoption disclosure and other predictors.     

Sufficient dimension reduction through informative predictor subspace

The purpose of this paper is to define the central informative predictor subspace to contain the central subspace and to develop methods for estimating the former subspace. Potential advantages of the proposed methods are no requirements of linearity, constant variance and coverage conditions in methodological developments. Therefore, the central informative predictor subspace gives us the benefit of restoring the central subspace exhaustively despite failing the conditions. Numerical studies confirm the theories, and real data analyses are presented.