: In this paper we describe the use of a set covering model with additional constraints for scheduling train drivers and conductors for the Dutch railway operator NS Reizigers. The schedules were generated according to new rules originating from the project "Destination: Customer" ("Bestemming:...

Changes in the market conditions for fruit and vegetables have induced Dutch co-operative auctions to restructure their sales and marketing activities. Nine auctions merged into VTN and established the marketing organisation The Greenery International BV. VTN/The Greenery have encountered many...

In this paper we evaluate applications of (return based) style analysis. The portfolio and positivity constraints imposed by style analysis are useful in constructing mimicking portfolios without short positions. Such mimicking portfolios can be used e.g. to construct efficient portfolios of...

The paper describes the emergence of entrepreneurship in Shanxi province based on fieldwork in the last 6 years. Employing institutional and evolutionary economics shows that both the kind of firms that emerge and the individual behaviour of entrepreneurs reflect a systematic response to the...

This paper deals with a practical application of an integrated approach to vehicle and crew scheduling, that we have developed previously. Computational results have shown that our approach can be applied to problems of practical size. However, application of the approach to the actual problems...

This paper tests whether hedging currency risk improves the performance of international stock portfolios. We use a generalized performance measure which allows for investor-dependencies such as different utility functions and the presence of nontraded risks. In addition we show that an...

The purpose of this paper is to develop a conceptual framework of managerial knowledge integration and to illustrate the framework for three levels of management: front-line, middle, and top management. Based on the framework, propositions will be derived relating managerial knowledge...

The relationship between Human Resource Management (HRM) and performance of the firm has been a hot debated topic in the field of HRM/IR for the last decade. Most scientific research on this topic originates from the USA. In our paper we will give an overview of recent USA-based research...

Will the reconstructed library of Alexandria prevent a forthcoming clash of civilizations? Inventing and re-inventing traditions requires total quality management and multiple networking in shifting alliances in the information space. Stock exchange of cultural forms has long abandoned the...

Inductive Logic Programming considers almost exclusively universally quantied theories. To add expressiveness, prenex conjunctive normal forms (PCNF) with existential variables should also be considered. ILP mostly uses learning with refinement operators. To extend refinement operators to PCNF,...