A Monte Carlo Study of Tests of Blockwise Weak Separability

Separability assumptions on functional structure have received a great deal of attention from econometricians and economic theorists because (a) separability provides the fundamental linkage between aggregation over goods and the maximization principles in economic theory, (b) separability provides the theoretical basis for partitioning the economy's structure into sectors, and (c) separability provides a theoretical hypothesis, which can produce parameter restrictions, permitting great simplification in estimation of large demand systems. The power of the various available tests for separability has never been determined, however. We conduct Monte Carlo studies to examine the capability of currently available methods to provide correct inferences about separability.     

Channel coordination in supply chains with agents having mean-variance objectives

This paper investigates the issues of channel coordination in a supply chain when the individual supply chain decision makers take mean-variance (MV) objectives. We propose an MV formulation to capture the risk preference of each individual supply chain agent. Through the studies of a wholesale pricing policy, we find that the incorporation of risk concerns into the setting of supply chain coordinating policy is very important because it can substantially affect the achievability of channel coordination. It is also interesting to find that channel coordination depends on how big the net difference between the risk preferences of the supply chain coordinator and the retailer is. Thus, a slightly risk averse supply chain coordinator can successfully coordinate with a slightly risk prone retailer but not a very risk averse retailer. Numerical analyses are included and managerial insights are developed.     

Technological alliance portfolio configuration and firm performance

Firms pursuing technological alliances to gain competitive advantages have become a ubiquitous phenomenon in today’s business environment. This article examines which technological alliance portfolio configuration is better for focal firm performance using a portfolio rather than a dyadic perspective. To assess technological alliance portfolio effects on Korean pharmaceutical and biotechnology firms, we adopted three explanatory variables—number of alliances, number of partners, and spanning structural holes. The growth rate of revenue and the growth rate of profit are used as dependent variables. We identify two characteristics of technological alliance portfolios from the two-step generalized method of moments estimates. First, we find that between two firms with the same number of alliances, the firm with the larger number of partners would have a better performance. This result is unlike those in previous studies because it distinguishes between the number of alliances and number of partners based on the network theory. Second, we find that spanning structural holes affects firm performance rather like a double-edge sword—it positively affects the growth rate of profit but negatively affects the growth rate of revenue of firms. In short, spanning structural holes is simultaneously beneficial for firm profitability and unfavorable for firm growth. This result differs from those of earlier studies because it shows that a firm spanning structural holes among alliance partners produces either a positive or a negative effect, suggesting that a firm should vary its strategy depending on whether it prioritizes profitability or growth.     

COMMUNICATION,COORDINATION, AND NETWORKS

We study experimentally the role of the network structure of pre‐play communication in determination of outcome and behavior in a multiplayer coordination game with conflicting preferences. We explore the trade‐off between the efficiency and equity of coordination outcomes and its link to the network structure of communication. Our results show substantial variations in both efficiency and equity of coordination outcomes across networks. While, as expected, increasing the length of communication improves the chance of successful coordination, it also reduces the asymmetry in the distribution of coordinated outcomes. We identify behaviors that explain variations in the distribution of coordinated outcomes both within and across networks. In all treatments, coordination is mostly explained by convergence in communication.     

Dealing with Endogeneity to Understand the Societal Impact of the Third Sector: Why Should We Care and What Can We Do about It?

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Endogeneity is often regarded as a key barrier in establishing the causal relationship between the third sector and its...     

Comparison of Temperament and Character Between Early- and Late-Onset Korean Male Pathological Gamblers

Purposes  

We investigated differences in temperament and character between early and late onset Korean pathological gamblers to identify whether the age of onset of pathological gambling (PG) could discriminate PG subtypes, like in alcoholism.     

Career Development and School Success in Adolescents: The Role of Career Interventions

Using longitudinal survey data, the present study examined the effect of participation on career development skills in 6 career education experiences and school success among South Korean adolescents (2,473 young men, 2,132 young women; mean age = 15.86 years). Regression analyses indicated that students who participated in career education programs in school once or twice over a 2‐year period had the highest scores in both career development skills and school success. In contrast, there was no relationship between career education, career development skills, and school success for students who participated in career education programs only once or not at all. Results support the influence of career education interventions on students' career development skills and school success. This study provides accountability information on the effectiveness of career education interventions at South Korean secondary schools. The authors offer suggestions about more effective career interventions that can be applied in South Korean high schools.     

A Qualitative Study of Victim Offender Mediation: Implications for Social Work

Restorative justice has grown extensively in recent years. However, existing research data indicate a lack of information regarding its process. This qualitative study aimed at providing an understanding of the experiences of participants in the delivery process. In addition to observation, 34 face-to-face interviews were conducted with 37 individuals. Analyses yielded important insights into multiple layers of participants' experiences. Though the participants indicated having had positive experiences, some insensitive approaches toward victims were also pointed out. This article discusses the implications in moving toward victim-sensitive restorative justice and for the social work profession.     

Optimal row-column designs for complete diallel crosses

Universally optimal row-column designs for complete, diallel crosses are investigated. Three series of designs that require just one replication of the crosses are provided. A series of designs having two replications of each cross is also provided.