Statistical measurement of trees’ similarity

Diagnostic theories are fundamental to Information Systems practice and are represented in trees. One way of creating diagnostic trees is by employing independent experts to construct such trees and compare them. However, good measures of similarity to compare diagnostic trees have not been identified. This paper presents an analysis of the suitability of various measures of association to determine the similarity of two diagnostic trees using bootstrap simulations. We find that three measures of association, Goodman and Kruskal’s Lambda, Cohen’s Kappa, and Goodman and Kruskal’s Gamma (J Am Stat Assoc 49(268):732–764, 1954) each behave differently depending on what is inconsistent between the two trees thus providing both measures for assessing alignment between two trees developed by independent experts as well as identifying the causes of the differences.     

Expo 2012 Yeosu Korea Stresses Ocean Protection

The World Expo,much like the Olympics and the World Cup,is a top global event bringing together countries from the farthest regions of the world.     

The nutrition transition and the human right to adequate food for adolescents in the Cape Town metropolitan area: Implications for nutrition policy

Changes in diet and nutrition, along with other lifestyle changes during the last decades, have affected the nutrition-related disease profile in many developing countries. This phenomenon, or process, is known as ‘The Nutrition Transition’. Several studies on adolescents in South Africa have shown that overweight and obesity are increasing, possibly due to this process. The aim of the present study was to extend our knowledge on the nutrition transition and the factors that influence adolescents’ choice of food in South Africa, and to develop policy recommendations that could facilitate the adolescents’ right to adequate food as laid down in the South African Constitutional Bill of Rights. The data were collected through focus groups with 25 female learners (grade 10, 14–16 years) from urban public schools in Cape Town and key informant interviews with 10 school staff members. The most important nutritional concerns that emerged from the analyses, included skipping breakfast and the consumption of unhealthy tuck shop food. In terms of the human right to adequate food, these findings reflected lack of availability and access to adequate food within the household, at schools, and in the community. In addition, the study showed that there were no or few opportunities for physical activity for adolescents during and after school hours. Social factors, including social norms and a need to conform to peer group pressure, appeared to affect the behaviour of learners considerably. Traditional foods appeared to have lost their importance, while learners preferred to consume fast foods and to adopt a more westernised diet connected to affluence and social acceptance. Traditional and more “Western” body perceptions co-existed among the study participants. The nutrition transition in South Africa is of a complex nature because of large differences that exist amongst different ethnic and socioeconomic groups. Policy decisions should be based on an understanding of these diverse factors. The media and the food industry should be encouraged to work with government in influencing adolescents to make healthy food choices. Cultural perceptions which may lead to unhealthy choices and lifestyle need to be addressed while at the same time respecting people’s cultural pride and human dignity. It is recommended that human rights principles are used purposively in the future in policy formulations, interventions, evaluation and monitoring.     

The nonprofit case for corporate volunteering: a multi-level perspective

ABSTRACT

This article argues that the nonprofit case for corporate volunteering is complex, requiring a multi-level perspective on the outcomes for nonprofit organizations (NPOs). To develop this perspective, we adopted an inductive research approach, conducting 39 exploratory semi-structured interviews with NPO staff. We argue that NPO scholars and practitioners should disentangle individual and organizational-level outcomes resulting from interactions between corporate volunteers and NPO staff, as such micro-dynamics ultimately affect NPO services. Moreover, these outcomes are subject to conditions at the organizational level (e.g. involvement of intermediaries), as well as at the individual level (e.g. type of assignment). Our study highlights the complexity that should be considered when addressing the fundamental question of whether corporate volunteering contributes to the ability of NPOs to provide their services, and under what conditions. We therefore propose that corporate volunteer management within NPOs is inherently, albeit contingently, intertwined with the services that these organizations provide.     

A classification framework and management approach for the sustainable use of natural assets used for tourism

There is growing concern internationally about how best to sustainably manage natural assets used by tourists. Existing approaches lack a coherent framework around which like‐assets can be clustered and managed consistently. In this paper we propose an integrated framework which provides for a simple‐to‐use asset classification system, management guidelines based on the relationship between importance and fragility of the asset, and a set of indicators based on the pressure–state–response model for monitoring management progress. Copyright © 2004 John Wiley & Sons, Ltd.     

Internet Auctions and Frictionless Commerce: Evidence from the Retail Gift Card Market

This study investigates the pricing of retail gift cards on eBay. We find substantially less price dispersion than previously documented in other online markets for consumer goods. As gift cards are homogenous goods with clearly defined value, this suggests that greater price dispersion found in other markets may be due to unobservable differences in product characteristics, or from lacking the competitive nature of auction environments. Additionally, gift cards for the discount retailer Wal-Mart exhibit less price dispersion than other large retailers’ gift cards, consistent with the perception that greater search by price-sensitive shoppers can lead to less friction in markets.     

Empirical Analysis of Competition between Wal-Mart and Other Retail Channels

This paper quantifies the degree of competition between Wal-Mart and different retail channels by exploiting a unique dataset that describes a consumer's choice of store. Using a discrete choice model, I estimate a consumer's choice of retailer in the sales market for DVDs among online, mass merchant, electronics, video specialty, and music stores. Wal-Mart competes more intensely with other mass merchants, and conditional on price and distance, the average consumer still prefers Wal-Mart to most other stores. I also consider a counterfactual experiment regarding the entry of Wal-Mart into 15 proposed store sites into California.     

Lost in translation: A sociological study of the role of fundraisers in mediating gift giving in non-profit organisations

Recent years have seen a significant growth in the technical literature exploring charitable giving and fundraising. However, there is little empirical research on the actual workings of the fundraising process within non-profit organisations. In this paper, the day-to-day practice of fundraising is analysed from a sociological perspective that draws on the theories of the gift proposed by Mauss ( 1954 ), Titmuss ( 1970 ), and colleagues to propose an alternative, more complex giving model to strangers. Using qualitative data drawn from 44 interviews with fundraisers and their colleagues across 14 organisations, this study examines how fundraisers build and maintain long-term giving relationships with the individuals who provide financial support to non-profit organisations. Findings suggest that the primary gift giving relationship exists not between the giver and beneficiary but rather between the giver and fundraiser. The fundraiser, in this instance, actively employs tactics of reciprocity to both secure new gifts and ensure that givers continue to support their organisation. In doing so, fundraisers construct a narrative of the donor's imagined direct connection to the beneficiary and their “good gift”. Simultaneously, the fundraiser works with colleagues to construct the idea of the caring, connected, and sacrificial donor as a means to solicit their support in maintaining the continued gifting from these supporters. The paper concludes with a consideration of the ways in which these narrative constructions are incorporated into fundraising and organisational strategies; and two implications for perceptions of the role of philanthropy and fundraising.