Solving the flight gate assignment problem using dynamic programming

This paper considers the problem of assigning flights to airport gates—a problem which is NP-hard in general. We focus on a special case in which the maximization of flight/gate preference scores is the only objective. We show that for a variable number of flights and gates, this problem is still NP-hard. For a fixed number of gates, we present a dynamic programming approach that solves the flight assignment problem in linear time with respect to the number of flights. Computational results using real life data from a major European airport prove the practical relevance of this approach.     

Can development communication improve urban management?

This paper is attempting to peg-out the particular role of ‘development support communication’ (DSC) for urban management in developing countries, for the interaction or interface between the public, the private, the non-governmental and the community sectors. The aim of this paper is to advocate to urban managers the inclusion of DSC among their management instruments, and in particular during the preparation and implementation of particular programmes and projects. The point is made that DSC will increase the chances for success of development projects and programmes, and that it will help to improve the relationships of urban stakeholders among each other.     

Effects of aging on Type II muscle fibers: a systematic review of the literature

The authors conducted a systematic review of the literature for scientific articles in selected databases to determine the effects of aging on Type II muscle fibers in human skeletal muscles. They found that aging of Type II muscle fibers is primarily associated with a loss of fibers and a decrease in fiber size. Morphological changes with increasing age particularly included Type II fiber grouping. There is conflicting evidence regarding the change of proportion of Type II fibers. Type II muscle fibers seem to play an important role in the aging process of human skeletal muscles. According to this literature review, loss of fibers, decrease in size, and fiber-type grouping represent major quantitative changes. Because the process of aging involves various complex phenomena such as fiber-type coexpression, however, it seems difficult to assign those changes solely to a specific fiber type.     

Linking Community Initiatives to National Institutions: Ghana

The ILO has developed an innovative concept of global solidarity for social security — the Global Social Trust — which supports the development of national social protection systems through international financing. The concept is ready to be tested nationally and the present paper proposes a pilot project for Ghana. The paper considers the virtues and weaknesses of developing-country social security healthcare systems and community-based voluntary insurance schemes, their lack of informal sector coverage on the one hand and their financial disequilibria on the other. It outlines the socio-economic and macro-policy context of Ghana and the current health policy environment. It argues for a fusion of the social health insurance and mutual health organization concepts in Ghana, thus linking community initiatives to national institutions, enhancing coverage and the quality of services for all. The paper outlines a basic model that could apply to Ghana, its organizational structure, practical functioning, financing arrangements and expected outputs. In particular it seeks to develop a model for the cross-subsidization of insurance premiums for the poor. It describes a concept that would combine local ownership initiatives with national responsibility and financing, arguing for a truly interrelated network of social protection. The authors welcome feedback and comments from the wider social security audience.     

TRANSPARENCY IN MARKETS FOR EXPERIENCE GOODS: EXPERIMENTAL EVIDENCE

We propose an experimental design to investigate the role of information disclosure in the market for an experience good. The market is served by a duopoly of firms that choose both the quality and the price of their product. Consumers differ in their taste for quality and choose from which firm to buy. We compare four different treatments in which we vary the degree to which consumers are informed about quality. Contrary to theoretical predictions, firms do not differentiate quality under full information. Rather, both tend to offer products of similar, high quality, entailing more intense price competition than predicted by theory. Under no information, we observe a “lemons” outcome where quality is low. At the same time, firms manage to maintain prices substantially above marginal cost. In two intermediate treatments, quality is significantly higher than the no‐information level, and there is evidence that prices become better predictors of quality. Taken together these findings suggest that information disclosure is a more effective tool to raise welfare and consumer surplus than theory would lead one to expect. (JEL L15, C91, D82)     

Changing Business Models and Employee Representation in the Airline Industry: A Comparison of British Airways and Deutsche Lufthansa

In recent years, the notion of business models has gained momentum in management research. Scholars have discussed several barriers to changing business models in established firms. However, the national institutions of market economies have not yet been discussed as barriers, even though they can constrain the latitude of action of a firm's management. Based on interviews and a longitudinal content analysis, we analyse the extent to which full service carriers in two countries (British Airways in the UK and Deutsche Lufthansa in Germany) have adopted elements of a low cost model over time. Furthermore, we investigate how this process has been influenced by the differences in each national institutional context. We particularly focus on the role of the rights of employee representatives in changes in business models. Our results show that British Airways has moved its business model more in the direction of low cost carriers than Deutsche Lufthansa, although the business model of the former airline still differs significantly from that of a typical low cost carrier. We identify national institutions that potentially strengthen the position of employee representatives as a factor that can influence, and also act as a barrier to, business model change.     

Persuasion under ambiguity

Theory and Decision - This paper introduces a receiver who perceives ambiguity in a binary model of Bayesian persuasion. The sender has a well-defined prior, while the receiver considers an...     

Women’s Agency in Egypt,Jordan, and Tunisia: The Role of Parenthood and Education

Population Research and Policy Review - Women in Middle Eastern and North African countries continue to report low levels of agency, despite their increasing educational attainment and declining...