Analysis of rescue and drowning history from a lifeguarded waterpark environment

The objective of this paper is to analyse rescue history from a lifeguarded waterpark environment using four characteristics: gender, age, water depth and type of aquatic attraction together with the actions taken by the guard to minimise the time needed to restore respiration in the case of loss of spontaneous respiration (LSR). Analysis of 63,800,000 guests with 56,000 rescues and 32 LSR rescues shows that children and shallow water both had relatively high levels of rescues [62.6% for children aged 1-12 years and 42% for water depth less than 1.52 m (5 ft)] and LSR rescues [53.2% for children aged 1-12 years and 65.6% for water depth less than 1.52 m (5 ft.)] with 87.5% of the LSR rescues resuming spontaneous respiration and 75% having a poolside neurological rating of Alert. Recommendations are made to train lifeguards in effective scanning and early victim recognition and rescue together with the use of in-water intervention in rescue protocols.     

Partitioning uncertain workloads

We present a method for determining the ratio of the tasks when breaking any complex workload in such a way that once the outputs from all tasks are joined, their full completion takes less time and exhibit smaller variance than when running on the undivided workload. To do that, we have to infer the capabilities of the processing unit executing the divided workloads or tasks. We propose a Bayesian Inference algorithm to infer the amount of time each task takes in a way that does not require prior knowledge on the processing unit capability. We demonstrate the effectiveness of this method in two different scenarios; the optimization of a convex function and the transmission of a large computer file over the Internet. Then we show that the Bayesian inference algorithm correctly estimates the amount of time each task takes when executed in one of the processing units.     

Institutions and the rise of taxes on labour in the OECD

Institutions and the Rise of Taxes on Labour in the OECD. —The aim of this paper is to explain differences among OECD countries in the evolution of taxes on labour during the last two decades. Its main message is that these taxes are to an important extent structurally and institutionally determined. Tax rates on labour are shown to have risen more strongly in countries where: (i) government has been controlled mainly by leftist parties; (ii) taxes (in general) are decided and collected mainly by central government (fiscal centralization); (iii) coalition and minority governments are frequent; (iv) the partisan composition (political colour) of these coalitions is unstable; (v) the labour market is neither centralized nor decentralized.     

De Moivre's Poisson Approximation to the Binomial

In his first work on probability, written in 1711, Abraham De Moivre looked at the problem of finding the number of trials required in a binomial experiment to achieve a probability of 1/2 of finding at least some given number of successes. He looked at two cases: when the probability of success  p  = 1/2 and when  p  is small but  n , the number of trials, is large. In the latter case, unlike other problems that he solved in probability, De Moivre never revealed his method of solution. We explore the solution that De Moivre originally suggests and find that his method does not work. We explore other numerical solutions and put forward the suggestion that De Moivre relied on a very cumbersome and tedious method of solution based on his earlier work on series in the 1690s. Since his method was neither quick nor mathematically elegant, he never revealed the method that he used to obtain his numerical solutions.     

A Simple Counterexample to Several Problems in the Theory of Asset Pricing

We give an easy example of two strictly positive local martingales that fail to be uniformly integrable, but such that their product is a uniformly integrable martingale. The example simplifies an earlier example given by the second author. We give applications in mathematical finance and we show that the phenomenon is present in many incomplete markets.     

Native Land Rights in Australia

How do aboriginal traditional land rights fare in the face of modern business? “Belatedly, Australia is dealing with a major human rights issue it has attempted to sweep under the rug for 200 years”. The author is completing his MBA at London Business School and is a mining engineer of Australian origin.     

Religiosity and Moral Identity: The Mediating Role of Self-Control

The ethics literature has identified moral motivation as a factor in ethical decision-making. Furthermore, moral identity has been identified as a source of moral motivation. In the current study, we examine religiosity as an antecedent to moral identity and examine the mediating role of self-control in this relationship. We find that intrinsic and extrinsic dimensions of religiosity have different direct and indirect effects on the internalization and symbolization dimensions of moral identity. Specifically, intrinsic religiosity plays a role in counterbalancing the negative impact of extrinsic religiosity on the internalization of moral identity. Further, intrinsic religiosity also counterbalances the negative and indirect impact of extrinsic religiosity on symbolization of moral identity via self-control. Lastly, self-control does not play a mediating role in the impact of religiosity on the internalization dimension of moral identity. We conclude that this study presents important findings that advance our understanding of the antecedents of moral identity, and that these results may have implications for the understanding of ethical decision-making.     

Impact of personal and cultural factors on knowledge sharing in China

Knowledge sharing has been the focus of research for more than a decade and it is widely recognized that it can contribute to the success of an organisation. However, in comparison with other countries, relatively little work on this topic has been done in the Chinese context. Knowledge sharing is particularly interesting to study in the Chinese context at the individual level, given the unique social and cultural characteristics of this environment. In this paper, we develop a theoretical model to explain how personal factors would affect people’s intention to share their knowledge. The Theory of Reasoned Action and Social Exchange Theory are used in this paper, as are the time dimension of national culture, face, and guanxi. A survey methodology is used to test the model. Face and guanxi orientation both exert a significant effect on the intention to share knowledge. Theoretical and practical implications, as well as directions for future research, are discussed.

The New EC Merger Control Regulation: Guaranteeing the Effectiveness of the Architecture of Separate Jurisdictional Zones?

Merger control in the European Union is shaped by an architecture of separate jurisdictional zones: the European Commission vets all mergers where the competition concern is of Community interest whereas mergers lacking a Community interest come under the jurisdiction of the relevant member state. For this architecture to be successful an effective case allocating test is essential. Since the original 1989 Merger Control Regulation (MCR) the allocating test – the Community Dimension test(s) – and the corrective structures supporting it have not fully conformed to the architecture of jurisdictional zones in practice. Why has this been the case? Does the new 2004 MCR solve the underlying problems?

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*Hull University Business School, UK.