推广转基因抗虫棉对次要害虫农药施用的影响分析

本研究的主要目的是分析在转基因抗虫棉有效控制棉花主要害虫(棉铃虫)、减少农药施用之后,可能导致的对棉花次要害虫的影响。通过多年的棉农生产跟踪调查和计量模型分析,研究结果表明,近年来棉农用来控制次要害虫的农药施用量有所增加,应引起有关部门的重视,但它的农药施用量远远小于采用转基因抗虫棉后整体减少施用的农药量;研究还发现,转基因抗虫棉在控制主要害虫农药施用量的减少,不是导致次要害虫农药施用量增加的主要原因,它仅仅能解释次要害虫农药施用增加量的一小部分。     

The contribution of social tourism to sustainable tourism: a case study of seasonally adjusted programmes in Spain

Recent policy from the European Union has attempted to justify social tourism initiatives on the basis that they lead to a more sustainable tourism industry. However, the majority of latest research in the field has been focused on the benefits for participants, with the addition of some evidence on the economic impacts of such programmes on destinations, which have pointed towards sustainability outcomes including: a longer tourism season, more even spread of demand, and longer periods of employment for tourism workers. Yet there is a lack of direct evidence linking such programme to these outcomes. This paper aimed to explore this important disconnect between policy assumptions and evidence-based outcomes through an analysis of the deseasonalising effects of the Spanish social tourism programme for older people. The research found that this programme does have an effect on the seasonal nature of employment and economic activity in most regions studied, but that the huge volume of demand from international tourists in the high seasons masks the quantitative effects in the regions with the highest seasonal concentration of international tourists. Recommendations for policy and practice in sustainable tourism are made that are transferable to many countries and regions that adopt social tourism programmes.     

Business models among SMTEs: identifying attitudes to environmental costs and their implications for sustainable tourism

This paper examines how environmental resources and costs feature in business models of small- and medium-sized tourism enterprises (SMTEs). Several studies have pointed to the generally positive nature of the relationship between the economic and environmental performance of tourism firms. Yet, although business models act as a vector between these aspects of firm performance, they have been overlooked in sustainable tourism discourse. The paper reports findings from discussion groups of SMTE businesses in South West England during the global economic downturn. Environmental costs and cost control were afforded relatively little importance in terms of value creation; conversely, there was a strong and predictable emphasis on revenue generation. Indirect tactics emerged for dealing with guests’ environmental behaviours which reflected this prevailing commercial logic. Green credentials were routinely de-emphasized, sometimes regarded as liabilities, in a form of greenhushing. Responses were framed by reference to social media and how online reviews may negatively impact on future value capture. Conceptually, the business model emerged as an important lens for understanding how environmental resources and costs were valourized. The paper highlights the need to ensure that contemporary approaches to environmental management in SMTEs reflect the current and fast-changing conditions that frame business models.     

Digging the backyard: Mining and quarrying in the UK and their impact on future land use

The future demand for land for mining and quarrying will be affected by a large number of economic, technological, environmental and social issues within the UK. Global developments also have a role to play. Although mining and quarrying account for only 0.9 per cent of the land area of England, the impact of this activity is considerable. Minerals are essential to the economy, for energy, construction, infrastructure and manufacturing, while their extraction has effects on the environment and on public perception. This paper examines current scientific understanding of the context of mining and quarrying, with particular reference to its impact on land use, along with the spatial relationship between minerals – which can only be worked where they occur – and other forms of land use and designation in the ‘post-industrial’ landscape of Britain. Looking out to 2060 and beyond, developments which may influence demand for minerals include climate change mitigation and adaptation; energy, food and raw material security; and new construction, manufacturing, recycling and re-use technologies. Factors influencing the supply side include the structure and ownership of the mining and quarrying industry, new extraction, processing and environmental technologies, ecosystem service provision, societal attitudes and land access. Although prediction carries a high level of uncertainty, continuous development of the regulatory framework is, and will remain, a major and pervasive factor in the relationship between mining and quarrying and land use.     

Antecedents, consequences, and mediating effects of perceived moral intensity and personal moral philosophies

This study uses responses from a survey of marketing professionals in a structural equation model linking antecedents and consequences of two dimensions of personal moral philosophies (idealism and relativism) and perceived moral intensity (PMI). Mixed support is found for hypothesized effects of gender, religiosity, education, experience, salary, and corporate ethical values on idealism and relativism. Idealism increases and relativism decreases PMI in four ethical scenarios. PMI increases perceptions of ethical problems, which reduce intentions to act unethically. The study tests whether relationships between variables, revealing that PMI has direct as well as indirect effects on intentions. Intentions are also influenced by gender: women have more ethical intentions than men, on average, and this effect is not mediated by other variables in the model. Anusorn Singhapakdi is an associate professor of marketing at Old Dominion University. He has also served on the marketing faculty at Lamar University, Texas, and at Thammasat University, Thailand. His papers on topics in marketing ethics and social responsibility have been published in theJournal of the Academy of Marketing Science, Journal of Business Ethics, Journal of Business Research, Journal of Macromarketing, Journal of Public Policy & Marketing, and various other journals and proceedings. Scott J. Vitell is the Phil B. Hardin Professor of Marketing at the University of Mississippi. He received his Ph.D. in marketing from Texas Tech University. His work has previously appeared in theJournal of the Academy of Marketing Science, Journal of Business Research, Journal of Macromarketing, Journal of Business Ethics, Research in Marketing, International Marketing Review, and in other journals and proceedings. George R. Franke is an associate professor and Reese Phifer Fellow of Marketing at the University of Alabama. His research interests include ethics, public policy, advertising, and research methodology. His publications have received best-paper awards from theJournal of Advertising, Journal of Marketing Research, American Marketing Association, and Southern Marketing Association.     

Perspectives on Natural Resources in the Global Economy: Polity Series Review

Polity's ‘Resources’ series is a set of scholarly books, each of them dealing with a single resource or resource‐based commodity from a generally global or international perspective. As of this writing, nine books have been published in the series, six of which I review here. The series is a welcome contribution to interdisciplinary and overall critical perspectives on the social and environmental dimensions and implications of the international appropriation, production and exchange of natural resources. While there is no clear disciplinary bent or theoretical foundation running across the volumes, together the books develop a transnational perspective, stressing the linkages between specific sites of appropriation and production, on the one hand, and broader political economic networks of processing, finance, coordination, commercial distribution and social regulation, on the other. The books should serve as valuable references to researchers in academic, government and non‐government institutional settings, but should also prove valuable for undergraduate teaching on contemporary natural resource industries and their social regulation.     

Can tourism be part of the decarbonized global economy? The costs and risks of alternate carbon reduction policy pathways

Global leaders agree on the need to substantially decarbonize the global economy by 2050. This paper compares potential costs associated with different policy pathways to achieve tourism sector emission reduction ambitions (?50% by 2035) and transform the sector to be part of the mid-century decarbonized economy (?70% by 2050). Investment in emissions abatement within the tourism sector, combined with strategic external carbon offsets, was found to be approximately 5% more cost effective over the period 2015–2050 than exclusive reliance on offsetting. The cost to achieve the ?50% target through abatement and strategic offsetting, while significant, represents less than 0.1% of the estimated global tourism economy in 2020 and 3.6% in 2050. Distributed equally among all tourists (international and domestic), the cost of a low-carbon tourism sector is estimated at US$11 per trip, equivalent to many current travel fees or taxes. Exclusive reliance on offsetting would expose the sector to extensive and continued carbon liability costs beyond mid-century and could be perceived as climate inaction, increasing reputational risks and the potential for less efficient regulatory interventions that could hinder sustainable tourism development. Effective tourism sector leadership is needed to develop a strategic tourism policy framework and emission measurement and reporting system.     

Examining CEO succession and the role of heuristics in early‐stage CEO evaluation

This study develops and tests predictions regarding factors that influence early‐stage CEO evaluation. We suggest that contextual elements of the CEO succession process will influence the heuristics that directors employ to aid in their early evaluation of a CEO because traditional performance metrics, such as firm performance, are less diagnostic of CEO quality in the first years of their tenure. Broad empirical support for our theoretical arguments is shown in a sample of Fortune 1000 firms. Copyright © 2012 John Wiley & Sons, Ltd.