Central European Journal of Operations Research

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Robust portfolio optimization for banking foundations: a CVaR approach for asset allocation with mandatory constraints
Central European Journal of Operations Research - - 2023
Maria Cristina Arcuri, Gino Gandolfi, Fabrizio Laurini
AbstractThis paper focuses on an innovative asset allocation strategy for risk averse investors who operate on very long-time horizons, such as endowments and the Italian foundations of banking origin (FBOs). FBOs play a pivotal role in supporting economic, financial and sustainable growth in the long term. In the search for a model which optimizes FBO portfolio ch...... hiện toàn bộ
Constrained Naïve Bayes with application to unbalanced data classification
Central European Journal of Operations Research - Tập 30 - Trang 1403-1425 - 2021
Rafael Blanquero, Emilio Carrizosa, Pepa Ramírez-Cobo, M. Remedios Sillero-Denamiel
The Naïve Bayes is a tractable and efficient approach for statistical classification. In general classification problems, the consequences of misclassifications may be rather different in different classes, making it crucial to control misclassification rates in the most critical and, in many realworld problems, minority cases, possibly at the expense of higher misclassification rates in less prob...... hiện toàn bộ
Quantifying and mitigating inefficiency in information acquisition under competition
Central European Journal of Operations Research - Tập 27 Số 4 - Trang 985-1007 - 2019
Jialu Li, Mingwei Yang, Xuan Zhao
Long-term load forecasting: models based on MARS, ANN and LR methods
Central European Journal of Operations Research - - 2019
Gamze Nalçacı, Ayşe Özmen, Gerhard Weber
Cheating as a dynamic marketing strategy in monopoly, cartel and duopoly
Central European Journal of Operations Research - Tập 28 - Trang 461-478 - 2019
Markus Eigruber, Franz Wirl
In 2015 it was discovered that Volkswagen had manipulated the exhaust emissions of its (diesel) cars. Since then, numerous other automotive car manufacturers were strongly suspected to violate against the same emission standards. This paper investigates how and why firms (monopoly, cartel and duopoly) engage in cheating, more precisely, promising attributes that are actually not part of the produc...... hiện toàn bộ
A procedure for the introduction of leanness into a company
Central European Journal of Operations Research - Tập 30 - Trang 1019-1049 - 2021
Davorin Cimermančič, Janez Kušar, Tomaž Berlec
Changing a traditional company into a lean one is a very complex and time-consuming process that needs to be addressed in an appropriate way, otherwise the project of introduction of leanness into a company may fail on the one hand and even have a negative impact on business operations of the company on the other. When introducing a change, a step-by-step procedure leading to a progress may be of ...... hiện toàn bộ
Multi-period resource allocation for estimating project costs in competitive bidding
Central European Journal of Operations Research - Tập 25 - Trang 303-323 - 2016
Yuichi Takano, Nobuaki Ishii, Masaaki Muraki
In competitive bidding for project contracts, contractors estimate the cost of completing a project and then determine the bid price. Accordingly, the bid price is markedly affected by the inaccuracies in the estimated cost. To establish a profit-making strategy in competitive bidding, it is crucial for contractors to estimate project costs accurately. Although allocating a large amount of resourc...... hiện toàn bộ
On the minimum number of resources for a perfect schedule
Central European Journal of Operations Research - Tập 31 Số 1 - Trang 191-204 - 2023
Rachid Benmansour, Oliver Braun
AbstractIn the single-processor scheduling problem with time restrictions there is one main processor and B resources that are used to execute the jobs. A perfect schedule has no idle times or gaps on the main processor and the makespan is therefore equal to the sum of the processing times. In general, more reso...... hiện toàn bộ
A tabu search tutorial based on a real-world scheduling problem
Central European Journal of Operations Research - Tập 19 - Trang 467-493 - 2010
Ulrike Schneider
We apply a tabu search method to a scheduling problem of a company producing cables for cars: the task is to determine on what machines and in which order the cable jobs should be produced in order to save production costs. First, the problem is modeled as a combinatorial optimization problem. We then employ a tabu search algorithm as an approach to solve the specific problem of the company, adapt...... hiện toàn bộ
Exploratory study of insurance companies in selected post-transition countries: non-hierarchical cluster analysis
Central European Journal of Operations Research - Tập 26 - Trang 783-807 - 2017
Tomislava Pavić Kramarić, Mirjana Pejić Bach, Ksenija Dumičić, Berislav Žmuk, Maja Mihelja Žaja
This paper focuses on the analysis of business practice of insurance companies in selected post-transition European countries. Specifically, it covers Croatian, Slovenian, Hungarian and Polish insurance markets in the year 2014 comprising the total of 119 insurance companies. Employing the non-hierarchical cluster analysis by applying the k-means approach, insurance companies are segmented into se...... hiện toàn bộ
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