Can the Mortensen-Pissarides Matching Model Match the Business-Cycle Facts?

We examine whether the Mortensen-Pissarides matching model can account for the business-cycle facts on employment, job creation, and job destruction. A novel feature of our analysis is its emphasis on the reduced-form implications of the matching model. Our main finding is that the model can account for the business-cycle facts, but only if the average duration of a nonemployment spell is relatively high—about 9 months or longer.     

A three state model of worker flows in general equilibrium

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.     

A logistics model for emergency supply of critical items in the aftermath of a disaster

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.     

Unpacking tourism SMMEs in South Africa: structure,support needs and policy response

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.     

Unpacking business tourism mobilities in sub-Saharan Africa

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.     

Advances in Information Ethics

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/)     

Successful SMEs in South Africa: The case of clothing producers in the Witwatersrand

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.     

Modelling and predicting the competitive effects of vertical mergers: The bargaining leverage over rivals effect

A new competitive effect of vertical mergers, based on the Nash bargaining model, has begun to play an important role in antitrust authorities’ evaluations of vertical mergers in the United States, Canada and abroad. The key idea is that a vertical merger will increase the bargaining leverage of the merged firm over its downstream rivals. Its bargaining leverage increases because it now takes into account the additional profit that its own downstream division will earn if it withholds inputs from downstream rivals, which changes its threat point in the bargaining game with downstream rivals. Consequently, the merged firm can increase the price that it charges rival downstream firms for inputs. One strong appeal of this theory is that it provides a simple and very intuitive formula to measure the upward pricing pressure caused by a vertical merger due to changes in bargaining leverage, based on variables whose values can generally be estimated using available data. This article describes this new competitive effect, which will be called the bargaining leverage over rivals (BLR) effect, and derives the upward pricing pressure formula. It also explains why this new competitive effect is distinct from the older raising rivals’ costs (RRC) effect that has been widely discussed in the economics literature, and discusses the relationship between the two different effects.     

Tourism,business linkages and small enterprise development in South Africa

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.