An examination of the nature of the relationship between Leader-Member-Exchange (LMX) and turnover intent at different organizational levels

The present study investigates the nature of the relationship between Leader-Member-Exchange (LMX) quality and turnover intent in the South Korean hospitality industry. Self-administered survey questionnaires were collected from 232 frontline workers as well as 88 supervisors employed in hotel properties. Prior research has produced mixed results, finding linear relationships between LMX quality and turnover intent in some studies and non-linear relationships in others. Traditional hierarchical regression analyses were performed to test the nature of the relationship in these two samples. We found evidence for a U-shaped curvilinear relationship between LMX and turnover intent for non-supervisory employees, but only a linear relationship for supervisory employees. Conceptual and practical implications and recommendations for future research are provided.     

Increasing the Informational Content of Reach and Frequency Estimates

This article discusses the limitations of present methods of analyzing the coverage of advertising schedules and presents a technique for obtaining additional information from traditional measures of schedule coverage. This technique models entire patters of audience exposure to commercials by means of a compound Bernoulli distribution that can be estimated from reach and frequency data. Knowledge of the complete pattern of audience exposure to advertising schedules assists the media analyst in selecting optimally effective advertising schedules and consequently enhances the probability of conducting a successful advertising campaign.     

Poor Kids: A Report on Children in Poverty

Media coverage of income inequality and the economic plight of the middle class fails to analyze the long-term effects of growing inequality and to consider possible solutions. The article examines the literature on media coverage of income inequality and the middle class, and then examines how three competing models, the neoclassical economic model, the propaganda model, and the institutionalist model, explain the inadequate coverage of the effects and solutions.     

On a rank-order test for the equality of probability of an event

Abstract

The following situation is considered. A fixed number (= n) or sequence of independent trials T ₁ T ₂,…, T _n is given, and in each of these an event E mayor may not occur, It is further observed that the event E occurs a total of k times amongst the n trials T _i , (i = l,…, n). It is then required to test the hypothesis H ₀ that the probability of the occurrence of E is constant from trial to trial, i.e. H ₀ is the hypothesis: p ₁ = p ₂ = ? = p _n = p, if p _n (i = 1, …, n) represents the probability that E occurs on the ith trial.     

AIDing contraception: HIV and recent trends in abortion

Using a difference-in-differences estimation framework and state-level data, we investigate the potential role of HIV/AIDS in contributing to declining abortion utilization in the United States. Our results suggest that the perceived risk of HIV contraction negatively affected unwanted pregnancies. Specifically, a 10% increase in HIV incidence is associated with 0.34–1.1% fewer abortions per live births, an effect that can account for at least one-tenth of the sharp decline in abortions observed from the early 1980s to mid-1990s.     

Do charitable causes need to segment their current donor base on demographic factors?: An Australian examination

Modern charities are facing increasing pressures requiring them to use more effectively a range of marketing activities, and segmentation may be one such tool. The giving literature suggests that the demographic factors of gender and age might serve as appropriate segmentation criteria and this paper examines whether motivations of existing donors vary by age or gender. The results suggest that there may be limited benefits in segmenting existing donors and that charities may be able to use similar promotional strategies for all existing donors. Copyright © 2002 Henry Stewart Publications     

Seven surprises for new CEOs

As a newly minted CEO, you may think you finally have the power to set strategy, the authority to make things happen, and full access to the finer points of your business. But if you expect the job to be as simple as that, you're in for an awakening. Even though you bear full responsibility for your company's well-being, you are a few steps removed from many of the factors that drive results. You have more power than anybody else in the corporation, but you need to use it with extreme caution. In their workshops for new CEOs, held at Harvard Business School in Boston, the authors have discovered that nothing--not even running a large business within the company--fully prepares a person to be the chief executive. The seven most common surprises are: You can't run the company. Giving orders is very costly. It is hard to know what is really going on. You are always sending a message. You are not the boss. Pleasing shareholders is not the goal. You are still only human. These surprises carry some important and subtle lessons. First, you must learn to manage organizational context rather than focus on daily operations. Second, you must recognize that your position does not confer the right to lead, nor does it guarantee the loyalty of the organization. Finally, you must remember that you are subject to a host of limitations, even though others might treat you as omnipotent. How well and how quickly you understand, accept, and confront the seven surprises will have a lot to do with your success or failure as a CEO.     

Global modelling revisited

Reasons for the great impact of World Dynamics and Limits to Growth include their addressing the correct audience (the public), and the ability of systems dynamics clearly to handle and communicate information on complex and often little understood areas. Modelling projects should usually be global or national (not regional), draw heavily on mental and not just written and numerical databases, and have time horizons of perhaps 100 years. Sadly, critics of Worlds 2 and 3 have yet to come to grips with the fundamental messages presented there, although these messages are becoming increasingly vital.     

Images in pathology: Alzheimer's disease

The review describes the histopathology and pathophysiology of Alzheimer's disease.