Preventing HIV in injection drug users: exploring the tradeoffs between interventions

Injection drug users (IDUs) transmit the human immunodeficiency virus (HIV) via both needle sharing and sex. Available interventions for this population have varying costs and effectiveness and focus on different risk behaviors. In this analysis, we look at two interventions. One is inexpensive, broad-based and provides modest risk reductions (street outreach (SO)); the other is narrowly focused, expensive and relatively effective (methadone maintenance). This analysis explores the effects of population risk behavior, intervention effectiveness, intervention costs, and decision constraints when allocating funds between these two interventions to maximize effectiveness. We develop a model of the spread of HIV, dividing IDUs into susceptibles (uninfected) and infectives, and separately portraying sex and injection risk. We simulate the epidemic in New York City for time periods from the mid-1980s to the early 1990s, and incorporate the behavioral effects of two interventions performed singly or in combination to find the allocation that maximizes the number of infections averted in the IDUs and their noninjecting sex partners, assuming interventions have increasing marginal costs. We find that the optimal allocation nearly always involves spending the maximum allowable amount on SO. This result is largely insensitive to variations in risk parameters, intervention efficacy, or cost. The model's structure, however, makes clear that many factors contribute to this insensitivity, namely the scope of the interventions, the dual drug/sex nature of HIV risk in the population, the asymmetry of sexual risk for men and women, and the potential benefits to nonIDUs.     

Which school systems sort weaker students into smaller classes? International evidence

We examine whether the sorting of high- and low-achieving students into classes of different sizes results in a regressive or compensatory pattern of class sizes for 18 national school systems. Sorting effects are identified by subtracting the causal effect of class size on performance from their total correlation. Our empirical results reveal strongly compensatory patterns of sorting within and especially between schools in many countries. Only the United States, which has a decentralized education finance and considerable residential mobility, exhibits regressive between-school sorting. Between-school sorting is more compensatory in systems with ability tracking. Within-school sorting is more compensatory where administrators rather than teachers assign students to classrooms.     

National culture,leadership and citizenship: Implications for cross-cultural management

Continued globalization is raising the level of diversity within hospitality organizations as well as the likelihood that leaders will manage those from varying national cultures. Previous research has found that cultural congruence between leaders and stakeholders (i.e., from the same or different national cultures) impacts a variety of variables including perceived leadership style, satisfaction and trust. This study extends this line of research by investigating the relationship between cultural congruence, perceived leadership style, leader–member exchange (LMX) and employee citizenship behaviors. Using a highly diverse sample of 520 members of congruent and incongruent dyads from 66 countries working for 2 large cruise lines and 2 subsidiaries, multivariate analysis of variance (MANOVA) was used to test the relationships. It was determined that cultural similarity impacted employee perceptions of LMX relations and organization citizenship behaviors, but not leadership style. The results of the study provide strategies for cross-cultural management in the hospitality industry.     

Influence of Soldout Products on Consumer Choice

Consumers often face situations in which information about soldout products is still present in the decision context. This paper demonstrates that the presence of soldout products in the decision environment can prompt consumers to purchase available options and decrease choice deferral. This effect can be explained by two underlying decision processes. First, soldout products may create a sense of urgency for consumers to expedite their purchases, which the authors call an immediacy effect. Second, soldout products may enhance the perceived attractiveness of products similar to the soldout products, which the authors refer to as an informational cascades effect.     

Understanding Social Welfare Capitalism,Private Property,and the Government’s Duty to Create a Sustainable Environment

No one would deny that sustainability is necessary for individual, business, and national survival. How this goal is to be accomplished is a matter of great debate. In this article I will show that the United States and other developed countries have a duty to create sustainable cities, even if that is against a notion of private property rights considered as an absolute. Through eminent domain and regulation, developed countries can fulfill their obligations to current and future generations. To do so, the governments must reject perfectly competitive free market capitalism and the absolute right to private property, and more fully adopt social welfare capitalism as their economic system. The result will be a sustainable society that balances democracy, individual rights and individual flourishing with the community’s flourishing.     

Implementing a Market Orientation in Small Manufacturing Firms: From Cognitive Model to Action

Using in-depth interviews of the CEO/Presidents of 21 small manufacturing firms, this research explored how leaders with a high market-oriented cognitive model have intentionally pursued the implementation of that model and how their activities differed from leaders with a low market-oriented cognitive model. Results indicated that leaders in high market-oriented organizations appeared to be working from cognitive models that reflected market-oriented values, and norms consistent with those suggested by Homburg and Pflesser. Additionally, results indicated strong consistencies across firms in the mechanisms used by leaders to implement their high market-oriented cognitive models and different but equally strong consistencies in the mechanisms used by leaders to implement their low market-oriented cognitive models. Structurally, high market-oriented leaders expressed less departmentalization than low market-oriented firms, used some form of internal customer/supplier networks, had very open communication systems, and established performance management systems designed to initiate and reward market-oriented behaviors among employees.     

The costs of governance in international companies

Using foreign direct investment as a governance mechanism has a cost side that goes beyond mere production and input costs. The governance costs of foreign operations are often vague and underestimated, and sometimes even ignored by companies entering a foreign market. The effects of these costs have also largely been neglected in former empirical research. This study examines the governance cost effects on foreign subsidiary performance. Using data from a survey of 160 Norwegian multinational companies the study shows that there are significant and negative relationships between bargaining, monitoring, and maladaptation costs and subsidiary performance. Conversely, costs incurred due to bonding activities are positively associated with performance. Overall, this study indicates that governance costs play a significant role in explaining the performance of foreign subsidiaries: close to 40% of the variation in performance can be attributed to such costs. Dealing with such costs is hence of utmost importance for the management of multinational companies.