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Recent Research Shows (recent + research_shows)
Selected AbstractsOBESITY AND NUTRIENT CONSUMPTION: A RATIONAL ADDICTION?CONTEMPORARY ECONOMIC POLICY, Issue 3 2007TIMOTHY J. RICHARDS Recent research shows that the dramatic rise in obesity in the United States is due more to the overconsumption of unhealthy foods than underactivity. This study tests for an addiction to food nutrients as a potential explanation for the apparent excessive consumption. A random coefficients (mixed) logit model is used to test a multivariate rational addiction model. The results reveal a particularly strong addiction to carbohydrates. The implication of this finding is that price-based policies, sin taxes, or produce subsidies that change the expected future costs and benefits of consuming carbohydrate-intensive foods may be effective in controlling excessive nutrient intake. (JEL D120, I120, C230) [source] Adaptation in new technology-based ventures: Insights at the company levelINTERNATIONAL JOURNAL OF MANAGEMENT REVIEWS, Issue 2 2006Petra Andries Recent research shows that, owing to the presence of uncertainty and ambiguity, new ventures have great difficulties in defining a viable business model from the outset and that minor or major adaptations to this initial business model are needed as the venture evolves. Technology-based companies are confronted with particularly high degrees of uncertainty and ambiguity. This paper therefore focuses on new technology-based ventures as a special case worth investigating. Most of the entrepreneurship literature studies adaptation at the individual level. However, many new technology-based firms are founded by a team of entrepreneurs. This paper therefore looks at how existing literature at the company level can inform us about adaptation in new technology-based companies. It starts by relating the concept of adaptation in new technology-based ventures to the existing literature on organizational adaptation at the firm level. Based on an overview of existing literature at the firm level, a propositional model is then put forward, describing (1) the process of adaptation and (2) the factors enabling adaptation in new technology-based ventures. [source] Facilitation research in marine systems: state of the art, emerging patterns and insights for future developmentsJOURNAL OF ECOLOGY, Issue 6 2009Fabio Bulleri Summary 1. Positive species interactions are increasingly recognized as important drivers of community structure and ecosystem functioning. Although the literature on facilitative interactions in terrestrial environments has been reviewed and emerging patterns have been synthesized, comparable attempts are lacking for the marine realm. 2. By means of a quantitative survey of the literature, I provide a critical summary of current knowledge on positive species interactions in marine environments. In particular, I (i) assess how marine facilitation research compares to that carried out in terrestrial environments in terms of focus and philosophical approach; (ii) illustrate the mechanisms by which facilitation takes place in different habitats; (iii) assess whether benefactor and beneficiary species are more likely to belong to the same or to a different trophic level; and (iv) provide examples of how including facilitation into ecological theory might advance our understanding of the mechanisms that regulate ecosystem functioning. 3. Except for some studies in intertidal habitats, few studies in marine environments have been framed within mainstream facilitation theory (e.g. the Stress Gradient Hypothesis) and research does not seem to be organized in a self-contained theme. Amelioration of physical conditions appears to be the most common mechanism of facilitation in intertidal habitats, whilst associational defence predominates in the subtidal. 4. In contrast to the terrestrial literature, dominated by plant,plant interactions, marine benefactors and beneficiary species often belong to different trophic levels. This might imply little overlapping of resource niches or a differential response to environmental conditions or consumer pressure, with implications for the persistence of facilitative effects at the extreme ends of stress gradients. 5. Recent research shows that facilitation can enhance temporal variability and invasibility of marine communities and emphasizes the central role of positive species interactions in regulating the functioning of natural ecosystems. 6.Synthesis. Studies encompassing a wide variety of life histories and environmental conditions are central to achieving a unified facilitation theory. Research in marine environments can provide new insights into the mechanisms underlying variations in the strength and direction of species interactions, but this will require greater awareness and consideration of facilitation. [source] Improved network performance via antagonism: From synthetic rescues to multi-drug combinationsBIOESSAYS, Issue 3 2010Adilson E. Motter Abstract Recent research shows that a faulty or sub-optimally operating metabolic network can often be rescued by the targeted removal of enzyme-coding genes , the exact opposite of what traditional gene therapy would suggest. Predictions go as far as to assert that certain gene knockouts can restore the growth of otherwise nonviable gene-deficient cells. Many questions follow from this discovery: What are the underlying mechanisms? How generalizable is this effect? What are the potential applications? Here, I approach these questions from the perspective of compensatory perturbations on networks. Relations are drawn between such synthetic rescues and naturally occurring cascades of reaction inactivation, as well as their analogs in physical and other biological networks. I specially discuss how rescue interactions can lead to the rational design of antagonistic drug combinations that select against resistance and how they can illuminate medical research on cancer, antibiotics, and metabolic diseases. , Editor's suggested further reading in BioEssays The evolutionary context of robust and redundant cell biological mechanismsAbstract Reprogramming cell fates: reconciling rarity with robustnessAbstract [source] Effect of perceived conflict among multiple performance goals and goal difficulty on task performanceACCOUNTING & FINANCE, Issue 2 2007Mandy M. Cheng M40; M41 Abstract Contemporary performance measurement systems, such as the balanced scorecard, often advocate the use of an array of financial and non-financial measures. Despite many claimed advantages for these systems, recent research shows that the inclusion of multiple performance measures sometimes has undesirable effects. The present study examines one of the potential problems of implementing these systems; namely, the impact of perceived goal conflict on task performance. Using survey data from employees working in multiple call centres in a telecommunication company, we find that perceived goal difficulty increases perceived goal conflict. Additionally, perceived goal difficulty also has a negative, indirect effect of task performance, through the mediating role of perceived goal conflict. Our results have important implications for both the research literature and the designers of performance measurement systems. [source] Eating fast food: attitudes of high-school studentsINTERNATIONAL JOURNAL OF CONSUMER STUDIES, Issue 1 2007Jan Mattsson Abstract Alarmingly consistent recent research shows that industrially produced foods such as fast food contain compounds that add to obesity and high cholesterol among young people. Less physical activity and a higher propensity to eat ready-made food (in Sweden and internationally) have aggravated the health situation for the young generation. They also have become ,addicted' to sugar by the consumption of lemonade and other sweet drinks that are often served in conjunction with fast food. Food consumption patterns are highly cultural, and, once formed in early years, they become difficult to change. The findings of this study, which was based on a small sample of written accounts and transcribed interviews, indicate that high-school students in Sweden are well aware of the good and bad attributes of fast food, such as: speed, convenience, fat and sugar. Clear differences in attitude were found between male and female students: female students view fast food in a broad food chain context, whereas male students concentrate on fast eating and satiety. [source] | |||||||||||||