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21.
Sara Rogerson 《International Journal of Logistics Research and Applications》2017,20(6):604-623
Emissions from freight transport stem from logistical variables such as vehicle utilisation, fuel efficiency, and distance. The purpose is to determine how shippers’ freight transport purchasing processes influence logistical variables. A multiple case study of freight transport purchasing processes was conducted, based on interviews with transport purchasers and providers. Three causes of influence of shippers’ purchasing processes on logistical variables were found: specific requirements, network structure of transport providers, and scope of contract. Specifications by purchasers, especially time requirements, influence several logistical variables (‘mode used’, ‘length of haul’, ‘load factor’, ‘empty running’, and ‘fuel efficiency’). This paper clarifies the implications of transport purchasing on CO2 emissions in terms of logistical variables, which are understood in transportation research and practice. It describes the effects of shippers’ requirements on transport providers’ execution of transport. The results provide a foundation for shippers to discuss their influence on logistical variables with transport providers. 相似文献
22.
Per Krusell Toshihiko Mukoyama Richard Rogerson Ay?egül ?ahin 《Journal of Economic Theory》2011,146(3):1107-1133
We develop a simple model featuring search frictions and a nondegenerate labor supply decision along the extensive margin. The model is a standard version of the neoclassical growth model with indivisible labor and idiosyncratic productivity shocks and frictions characterized by employment loss and employment opportunity arrival shocks. We argue that it is able to account for the key features of observed labor market flows for reasonable parameter values. Persistent idiosyncratic productivity shocks play a key role in allowing the model to match the persistence of the employment and out of the labor force states found in individual labor market histories. 相似文献
23.
A logistics model for emergency supply of critical items in the aftermath of a disaster 总被引:4,自引:0,他引:4
This paper proposes a logistics model for delivery of prioritized items in disaster relief operations. It considers multi-items, multi-vehicles, multi-periods, soft time windows, and a split delivery strategy scenario, and is formulated as a multi-objective integer programming model. To effectively solve this model we limit the number of available tours. Two heuristic approaches are introduced for this purpose. The first approach is based on a genetic algorithm, while the second approach is developed by decomposing the original problem. We compare these two approaches via a computational study. The multi-objective problem is converted to a single-objective problem by the weighted sum method. A case study is presented to illustrate the potential applicability of our model. Also, presented is a comparison of our model with that proposed in a recent paper by Balcik et al. [6]. The results show that our proposed model outperforms theirs in terms of delivering prioritized items over several time periods. 相似文献
24.
Christian M. Rogerson 《旅游业当前问题》2013,16(1):44-56
As considerable numbers of people in emergent world tourism regions engage in independent business travel, meeting, incentives, conferences and exhibitions tourism or practices of informal business tourism the theme of business mobilities merits greater attention in the evolving tourism scholarship of these regions. This article interrogates existing scholarship and research issues pertaining to understanding evolving tourism mobilities specifically in the emerging tourism region of sub-Saharan Africa, where, arguably, more than in any other region of the global tourism economy, the topic of business mobilities merits high priority attention. For sub-Saharan Africa as a whole a growing weight of evidence suggests that business tourism flows – domestic and intraregional – account for a larger share of tourism movements than leisure tourism. In interpreting the complex flows of business mobilities in the African continent it is necessary to go beyond dominant Northern conceptions of what constitutes a business tourist and in particular to understand the activities of the informal-sector business tourist. A useful start point for unpacking business tourism mobilities is to differentiate and apply a typology of international formal-sector tourism, international informal-sector tourism, domestic formal-sector tourism and domestic informal-sector tourism. 相似文献
25.
Christian M Rogerson 《Development Southern Africa》2005,22(5):623-642
Small enterprise (SMME) support policy in post-apartheid South Africa has traditionally involved support initiatives in the form of ‘generic’ packages that overlook the specificities of particular sectors. In this article the specific issues concerning SMME development in tourism are investigated. Against a backcloth of a review of international scholarship on tourism small firms, the article presents findings from recent empirical investigations into the progress and problems of tourism SMME development in South Africa. Within the international scholarship and policy debates on tourism, it is argued that the South African experience is particularly distinctive in two respects: (1) the support of particular groups of tourism SMMEs linked to objectives of transformation and (2) the introduction of dedicated tourism-specific support programmes for SMME development. 相似文献
26.
Advances in Information Ethics 总被引:1,自引:0,他引:1
Simon Rogerson 《Business ethics (Oxford, England)》1997,6(2):73-75
The versatility and adaptability of information technology offer many potential benefits to society, its organisations and its citizens; but there are also many associated risks. The social and ethical implications of this technology warrant special attention and have resulted in the creation of information ethics as a discrete area complementary to business ethics. Simon Rogerson is Director of the Centre for Computing and Social Responsibility at De Montfort University, The Gateway, Leicester, LE1 9BH, UK. (email: srog@dmu.ac.uk and web site http://www.cms.dmu.ac.uk/CCSR/) 相似文献
27.
28.
Christian M Rogerson 《Development Southern Africa》2000,17(5):687-716
The objective in this article is to examine the key determinants of successful SME development in post-apartheid South Africa. The determinants of successful SME growth are investigated by concentrating upon one specific branch of manufacturing, namely clothing production in the Witwatersrand. The article unfolds through four sets of material. First, a review is undertaken of research concerning the factors influencing successful SMEs in sub-Saharan Africa. Major themes are the elements of successful individual enterprise, successful clusters of enterprises and of available research in South Africa. In section two, attention turns to the case study and outlines key features of the development of the South African clothing industry. Section three presents the findings from 27 detailed interviews conducted with successful clothing producers in the Witwatersrand. Overall, it is concluded that the South African research confirms certain of the findings relating to trajectories of successful SME development in other parts of Africa. 相似文献
29.
C M Rogerson 《Development Southern Africa》1993,10(1):33-44
Recently, an increase has been observed in the practices of urban food gardening and the cultivation of vacant land on the peripheries of South Africa's metropolitan areas. In this paper it is argued that urban agriculture represents an issue of considerable importance for South African policy makers. A review is undertaken of research on informal agriculture in Asian and African cities. On the basis of this International review certain suggestions are offered for policy debates and research in South Africa. 相似文献
30.
Although considerable attention is given to the prospects for developing small, medium and micro-enterprises (SMMEs) in South Africa's tourism economy, very little relevant research has been undertaken in this regard. In this article, the findings are presented from over 60 detailed interviews conducted with key enterprises and entrepreneurs involved in tourism, outsourcing and small enterprise development in South Africa. The aim is to examine opportunities for outsourcing and business linkage development in South Africa's tourism economy, and to investigate the difficulties that confront the tourism SMME economy through examining the status of business linkages between large tourism enterprises and SMMEs in South Africa. The South African research is located within the context of existing works on tourism and small enterprise development in developing countries. 相似文献