The Law of Demand versus Diminishing Marginal Utility

Diminishing marginal utility (DMU) is neither necessary nor sufficient for downward-sloping demand. Yet, upper-division undergraduate and beginning graduate students often presume otherwise. This paper provides two simple counter-examples that can be used to help students understand that the Law of Demand does not depend on DMU. The examples are accompanied with the geometry and basic mathematics of the utility functions and the implied ordinary/Marshallian demands.     

How did a network of marine protected areas impact adjacent fisheries? Evidence from Australia

Marine‐protected areas (MPAs) are an effective means of improving habitat quality and biodiversity in the world’s oceans. While the advantages of MPAs as a mechanism for conservation and biodiversity are well established, the potential improvements to fishery performance resulting from a network of MPAs are still being established. Countries around the world have committed to establishing networks of MPAs within their waters by 2020, in response to the United Nations Convention on Biological Diversity. This, coupled with the increasing global demand for seafood and heavy reliance on fishery resources as a source of economic development for many coastal communities, means that an understanding of how these networks can be expected to impact fishery performance is extremely important. We use a difference‐in‐difference modelling approach to isolate the change in the fishery performance associated with the south‐east marine reserve network in Australia. We find no evidence that the economic performance of adjacent fisheries was negatively impacted by the network. This lack of impact is likely due to a network design explicitly intended to avoid effort displacement in key fisheries, along with fishery management changes intended to remove excess fishing capacity.     

SOCIO-ECONOMIC FACTORS IN LAND CLASSIFICATION

Three interpretive systems of soil classification for agriculture were compared with respect to land use, crop yields, and certain economic characteristics. Sixty-eight farms in the Peace River area of British Columbia were classified as high or low under the ARDA, soil survey, and agronomic classification systems. Mean values for the two categories of farms under each classification system were computed and tested for statistical significance. The results indicated that as the number of significant differences increased, so did the management consideration. Consequently, the agronomic classification was the best indicator, followed by the ARDA system, and then the soil survey productivity index. Considering the basic concepts of the classification systems, this trend was not entirely unexpected. The results suggest that the management factor should play a larger role in developing viable interpretive soil classification systems and that co-operation should be sought among the various disciplines concerned with agricultural land use. LES FACTEURS SOCIO-ECONOMIQUES DANS LA CLASSIFICATION DES SOLS ACRICOLES – Trois systèmes de classification des sols agricoles ont été comparés avec I'aide du type d'utilisation des sols, du rendement des récoltes et de certaines caractéristiques économiques. Soixante-huit fernws dans la zone de “Peace River” en Colombie Britannique out été classifiés, en deux catégories avec I'aide de I'ARDA de I'enquête des sols et des systèmes de classification agronomique. Les principals valeurs pour les deux catégories de fermes appartenant à chaque système de classification ont été calculées et testées afin de vérifier leur signification statistique. Les résultats indiquérent que le nombre de différences significatives augmentaient en mêmc temps que la qualityé du “management”: Conséquence directe, la classification agronomique etait le meilleur indicateur, suivi du systeme ARDA et enfin de lindice de productivityé de l'enquête des sols. Étant donné les concepts de base de ces systèmes de classification, cette tendance n‘était pas complètement inattendue. Les résultats suggèrent que le facteur de “management” devrait jouer un rôle plus large en développant des systèmes de classification des sols viables et que la coopération devrait être recherchée parmi les différentes disciplines concernées par Vutilisation agricole des sols.     

Are tourism impacts low on personal environmental agendas?

This paper examines if tourism is an environmental priority for tourism and hospitality students. It is framed within the context of information and choice overload that may result in the need to prioritize issues and make less effective decisions. A series of open-ended questions identified the most important community and global environmental issues, the single greatest cause of climate change and whether students had changed their behaviour in general, or their travel behaviour in particular, to reduce their environmental impact. A total of 2968 useable surveys were returned from students at 63 institutions in 22 economies. Tourism emerged as a low priority issue, which explains why only a small proportion of students had changed their travel behaviour. Moreover, the study noted high knowledge variability, which in turn was closely associated with the type of actions undertaken. Students with specific knowledge were far more likely to adopt specific change actions than those who had less precise knowledge. They, in turn, were more likely to identify generic and less effective actions. The study concludes that the main challenge involved in changing tourism behaviour rests primarily with raising its status to a higher priority, a difficult task given the environmental issue overload that most people face.     

Athleticism and the reproduction of gender and ethnic marginality

Our paper explores the construction of ethnic and gender identities through sport and physical education, arguing that the social attitudes of women and members of ethnic minorities to sport helps to define their marginal position in society. We analyse the literature with respect to ethnicity, gender and sport within the framework of recent ethnographic research, and show how gender and ethnic factors markedly affect attitudes to sport. The wider implications of these attitudes are examined and related to work, unemployment and marginal social status. Attitudes to sport are seen to be significant in establishing attitudes to leisure as a whole, which is discussed in terms of social reproduction and the state. We extend the notion of marginality to take account of the importance of leisure behaviour in explaining and justifying the status of women and ethnic minorities in society.