Optimal portfolios with minimum capital requirements

We propose a novel approach to active risk management based on the recent Basel II regulations to obtain optimal portfolios with minimum capital requirements. In order to avoid regulatory penalties due to an excessive number of Value-at-Risk (VaR) violations, capital requirements are minimized subject to a given number of violations over the previous trading year. Capital requirements are based on the recent Basel II amendments to account for the ‘stressed’ VaR, that is, the downside risk of the portfolio under extreme adverse market conditions. An empirical application for two portfolios involving different types of assets and alternative stress scenarios demonstrates that the proposed approach delivers an improved balance between capital requirement levels and the number of VaR exceedances. Furthermore, the risk-adjusted performance of the proposed approach is superior to that of minimum-VaR and minimum-stressed VaR portfolios.     

The role of transformational leadership,emotional intelligence,and group cohesiveness on leadership emergence

The concept of emotional intelligence and its connections with other important psychological constructs have been the focus of a wide range of current research (see Mestre & Fernández‐Berrocal, 2007, and Salovey, Woolery, & Mayer, 2001, for reviews). Yet the relationship between emotional intelligence and transformational leadership, a leadership style that is highly correlated with efficiency and satisfaction of the leaders' followers, has scarcely been analyzed. We hypothesize that individuals who score high in emotional intelligence emerge as leaders more easily than low‐emotional‐intelligence individuals due to the fact that they are more transformational in their leadership style. We further suggest that this is especially the case in highly cohesive groups. In this study, we test these ideas and find empirical support for our hypotheses.     

MGARCH models: Trade-off between feasibility and flexibility

Multivariate GARCH (MGARCH) models need to be restricted so that their estimation is feasible in large systems and so that the covariance stationarity and positive definiteness of conditional covariance matrices are guaranteed. This paper analyzes the limitations of some of the popular restricted parametric MGARCH models that are often used to represent the dynamics observed in real systems of financial returns. These limitations are illustrated using simulated data generated by general VECH models of different dimensions in which volatilities and correlations are interrelated. We show that the restrictions imposed by the BEKK model are very unrealistic, generating potentially misleading forecasts of conditional correlations. On the other hand, models based on the DCC specification provide appropriate forecasts. Alternative estimators of the parameters are important in order to simplify the computations, and do not have implications for the estimates of conditional correlations. The implications of the restrictions imposed by the different specifications of MGARCH models considered are illustrated by forecasting the volatilities and correlations of a five-dimensional system of exchange rate returns.     

Processes and effects of targeted online advertising among children

Increasingly, information from children's profile pages on social network sites is being used to target online advertising, a phenomenon known as profile targeting. This practice has raised concerns in society and academia; however, its effects among children remain unstudied. Therefore, we investigated the effects of profile targeting on children's brand responses (i.e., brand attitude and purchase intention). We examined two types of targeting: targeting of product and of form (i.e., color). In addition, we tested three underlying mechanisms: liking the advertisement, perceived personal relevance of the advertisement, and recognizing the targeting aspect of the advertisement (targeting recognition). A between-subjects experiment among 231 children aged 9–13 years showed that targeting the product leads to more positive brand attitudes and purchase intentions. In addition, the effects were explained by ad liking and not by perceived personal relevance or targeting recognition. These findings suggest that, unlike adults, children do not process profile targeting on an elaborate critical level. Rather, the processing seems to be less elaborate.     

Justifications and Questions in Detecting Deception

Truth-tellers and deceivers use justifications to bolster their credibility, but given their different motivations, truth-tellers and deceivers may use justifications differently. Participants were assigned the role of allocator or recipient in an ultimatum game. Allocators received money based on their performance on a task and made an offer. Recipients did not have information about allocator’s task performance or amount the allocator received, and therefore, allocators could deceive. Liars provided more plausible details to support their offer by stating the structure of their task; this strategy backfired and led to more detection of lies. Truth-tellers were more likely to disclose advantageous information about their endowment of money in their justifications, and this reduced suspicion in their offers. Deceivers used more wrap-up questions to end the interaction; this did not help reduce partner suspicion. Asking questions in general did not improve detection accuracy.     

The supply-side of environmental sustainability and export performance: The role of knowledge integration and international buyer involvement

Most of previous studies seek to understand buyer perspectives in green supply chain relationships and devote inadequate attention to the strategic role of upstream suppliers. Drawing on a market-oriented approach to sustainability, this paper examines the enabling factors and processes that underpin how export suppliers from emerging economies leverage their strategic intent to develop knowledge integration capacity for achieving improved export performance. The results from a sample of Chinese exporters show that the relational capacity of knowledge integration mediates the performance impact of market-oriented environmental sustainability, and such a mediating process of leaning is further enhanced by international buyer involvement. We reveal that relationship efforts should be directed at developing integrative capacity involving key partners for implementing proactive environmental strategy in international business-to-business (B2B) markets. This study contributes to the research of supply chain sustainability in a global context.     

Differentiated industries without entry barriers

Our objective is to predict the evolution of an industry without entry barriers where products are differentiated on the basis of quality. Each firm chooses a single brand whose characteristics and amount of production is determined by the firm. The analysis suggests two different stages in the evolution. The first is a stage of growth and the second is a stationary stage in terms of aggregate production. While during the first stage the entry of additional brands results in the reduction of average quality, during the second stage entry leads to increased average quality. Hotelling's principle of “minimum differentiation” is contradicted in the model.