In the present paper an analysis of the neo-classical optimization model with linear constraints is proposed. By introducing the dual problem it is shown that the solution to the maximization problem is also a solution to the minimization problem. The purely theoretical model proposes a...

Die Industrie in Deutschland hat bis zum dritten Quartal das Produktionsniveau des Vorjahres knapp halten können. Sie stand einer im Jahresverlauf stark rückläufigen Nachfrage aus dem Inland und dem Euroraum und einer leicht steigenden Nachfrage aus dem Nicht-Euroraum gegenüber. Für das...

Econometric models, in the estimation of real estate prices, are a useful and realistic approach for buyers and for local and fiscal authorities. From the classical hedonic models to more data driven procedures, based on Artificial Neural Networks (ANN), many papers have appeared in economic...

In this paper, a fuzzy multiobjective mathematical programming model for operational transport planning in a supply chain is presented. The objectives of the proposed model are the minimization of the number of used trucks and the total inventory level, by considering vehicle capacities as a...

This paper presents a critical analysis of some of the techniques which are applied in practice to obtain composite indicators from a previous sub-indicator system. In studying each methodology, we identify the advantages and disadvantages associated with them, paying particular attention to...

This paper analyzes the importance of having a network of stations adapted to vehicles carrying dangerous goods. In the r̄st place, it is studied the current demand which is offered by the existing parking areas, and in the second place, it is explained a maximum coverage location model in...

The generalized truck-and-trailer routing problem (GTTRP) constitutes a uniēd model for vehicle routing problems with trailers and a fixed lorry-trailer assignment. The GTTRP is a generalization of the truck-and-trailer routing problem (TTRP), which itself is an extension of the well-known...

In this paper we investigate how to allocate the available budget for agri-environmental measures to maximise environmental benefits and to minimise potential negative side effects resulting for farmers from the implementation of agri-environmental measures. According to the governmental and EU...

Investment of portfolio known that there is an important level of uncertainty about the future worth of a portfolio. The concept of value at risk (VAR) has been used to help describe a portfolio's uncertainty. The current trend of investment in India is to invest in stock market which...