Evolución de la inversión vs. evolución de la selección portuaria provincial

Las mejoras introducidas en el sector del transporte han propiciado que una misma mercancía pueda ser transportada eficientemente desde diferentes puertos y, consecuentemente, han venido acompañadas de un incremento de la inversión en infraestructura. Sin embargo, la selección portuaria llevada a cabo desde las provincias españolas para canalizar sus flujos de contenedores permanece estable, lo que sugiere que no ha respondido a las estrategias competitivas desarrolladas por los gestores de los principales puertos peninsulares, cuyo resultado parece estar relacionado con su respectiva ubicación

Learning and Applying Cooperative Solutions: A Classroom Experiment on Transportation Games

In a trade experiment, groups of students were taught how to bargain over a pie generated in a transportation game. Data collection and detailed group reports of the bargaining process allowed us to identify the type of bargaining followed and its correspondence with cooperative game theory concepts. Explicit coalitions were rather scarce (17%), although coalition stability was implied by 47.8% of the agreements. Efficiency was achieved in the vast majority (82%) of cases, whereas in 34.8% of the agreements, students used a lexicographic ordering of multiple solutions before choosing among them. Regarding the bargaining procedure, in 40% of the agreements, quantities traded were decided before profit sharing rules were negotiated, whereas in 16% of the cases they were simultaneously agreed upon. Our findings suggest that bargaining procedures often do not imply explicit coalitions. Moreover, efficiency can be achieved even in the absence of bargaining processes

Integer Linear Programming Optimization of Joint RRM Policies for Heterogeneous Wireless Systems

Wireless systems will be characterized by the coexistence of heterogeneous Radio Access Technologies (RATs) with different, but also complementary, performance and technical characteristics. These heterogeneous wireless networks will provide network operators the possibility to efficiently and coordinately use the heterogeneous radio resources, for which novel Joint Radio Resource Management (JRRM) policies need to be designed. In this context, this work proposes and evaluates a JRRM policy that simultaneously determines for each user an adequate combination of RAT and number of radio resources within such RAT to guarantee the user/service QoS requirements, and efficiently distribute the radio resources considering a user fairness approach aimed at maximizing the system capacity. To this aim, the JRRM algorithm, which takes into account the discrete nature of radio resources, is based on integer linear programming optimization mechanisms

Multi-issue bankruptcy problems with crossed claims

In this paper, we introduce a novel model of multi-issue bankruptcy problem inspired from a real problem of abatement of emissions of different pollutants in which pollutants can have more than one effect on atmosphere. In our model, therefore, several perfectly divisible goods (estates) have to be allocated among certain set of agents (claimants) that have exactly one claim which is used in all estates simultaneously. In other words, unlike of the multi-issue bankruptcy problems already existent in the literature, this model study situations with multi- dimensional states, one for each issue and where each agent claims the same to the different issues in which participates. In this context, we present an allocation rule that generalizes the well-known constrained equal awards rule from a procedure derived from analyzing this rule for classical bankruptcy problems as the solution to a sucession of linear programming problems. Next, we carry out an study of its main properties, and we characterize it using the well-known property of consistency

On priority in multi-issue bankruptcy problems with crossed claims

In this paper, we analyze the problem of how to adapt the concept of priority to situations where several perfectly divisible resources have to be allocated among certain set of agents that have exactly one claim which is used for all resources. In particular, we introduce constrained sequential priority rules and two constrained random arrival rules, which extend the classical sequential priority rules and the random arrival rule to these situations. Moreover, we provide an axiomatic analysis of these rules.Comment: 12 pages. arXiv admin note: substantial text overlap with arXiv:2202.0987

Measures of relevance to the success of streaming platforms

Digital streaming platforms, including Twitch, Spotify, Netflix, Disney, and Kindle, have emerged as one of the main sources of entertainment with significant growth potential. Many of these platforms distribute royalties among streamers, artists, producers, or writers based on their impact. In this paper, we measure the relevance of each of these contributors to the overall success of the platform, which is information that can play a key role in revenue allocation. We perform an axiomatic analysis to provide normative foundations for three relevance metrics: the uniform, the proportional, and the subscriber-proportional indicators. The last two indicators implement the so-called pro-rata and user-centric models, which are extensively applied to distribute revenues in the music streaming market. The axioms we propose formalize different principles of fairness, stability, and non-manipulability, and are tailor-made for the streaming context. We complete our analysis with a case study that measures the influence of the 19 most-followed streamers worldwide on the Twitch platform

On the Difficulty of Budget Allocation in Claims Problems with Indivisible Items and Prices

First of all, the authors thank the Associate Editor and three anonymous Reviewers for their time to review our paper and also for their for their incisive comments and suggestions which have been very helpful to improve the contents of the paper. The authors gratefully acknowledge financial support from the Ministerio de Ciencia, Innovacion y Universidades (MCIU), the Agencia Estatal de Investigacion (AEI) and the Fondo Europeo de Desarrollo Regional (FEDER) under the project PGC2018-097965-B-I00 and the Spanish Ministry of Science under Project ECO2017-86245-P, as well as Junta de Andalucia under Projects Grupos PAIDI SEJ426 and project P18-FR-2933.In this paper we study the class of claims problems where the amount to be divided is perfectly divisible and claims are made on indivisible units of several items. Each item has a price, and the available amount falls short to be able to cover all the claims at the given prices. We propose several properties that may be of interest in this particular framework. These properties represent the common principles of fairness, efficiency, and non-manipulability by merging or splitting. Efficiency is our focal principle, which is formalized by means of two axioms: non-wastefulness and Pareto efficiency. We show that some combinations of the properties we consider are compatible, others are not.Ministerio de Ciencia, Innovacion y Universidades (MCIU)Agencia Estatal de Investigacion (AEI)European Commission PGC2018-097965-B-I00Spanish Government ECO2017-86245-PJunta de Andalucia PAIDI SEJ426 P18-FR-293

Evolution of the investment versus evolution of the provincial ports selection

Las mejoras introducidas en el sector del transporte han propiciado que una misma mercancía pueda ser transportada eficientemente desde diferentes puertos y, consecuentemente, han venido acompañadas de un incremento de la inversión en infraestructura. Sin embargo, la selección portuaria llevada a cabo desde las provincias españolas para canalizar sus flujos de contenedores permanece estable, lo que sugiere que no ha respondido a las estrategias competitivas desarrolladas por los gestores de los principales puertos peninsulares, cuyo resultado parece estar relacionado con su respectiva ubicación.The improvements introduced in the transportation sector have propitiated that a merchandise flow can be transported efficiently from different ports and, consequently, they have come accompanied by an increase of the infrastructure investment. However, the port selection carried out from the Spanish provinces to channel their flows of containers remains stable, what suggests that it has not responded to the competitive strategies developed by the managers of the biggest peninsular ports, whose result seems to be related with their respective location

On horizontal cooperation in linear production processes with a supplier that controls a limited resource

In this paper we consider a two-echelon supply chain with one supplier that controls a limited resource and a finite set of manufacturers who need to purchase this resource. We analyze the effect of the limited resource on the horizontal cooperation of manufacturers. To this end, we use cooperative game theory and the existence of stable distributions of the total profit among the manufacturers as a measure of the possibilities of cooperation. The game theoretical model that describes the horizontal cooperation involves externalities, which arise because of the possible scarcity of the limited resource and the possible coalition structures that can be formed. Furthermore, manufacturers do not know how the supplier will allocate the limited resource, therefore, how much of this resource they will obtain is uncertain for all concerned. Nevertheless, when the limited resource is not scarce for the grand coalition, the existence of stable distributions of the total profit is guaranteed and consequently the collaboration among the manufacturers is profitable for them all. In the event that the limited resource is insufficient for the grand coalition, we introduce a new cooperative game that assesses the expectations of each coalition of manufacturers regarding the amount of the limited resource they can obtain. We analyze two extreme expectations: the optimistic and the pessimistic. In the optimistic case, we cannot reach a conclusion regarding the full cooperation of the manufacturers. In the pessimistic case, with one reasonable assumption, the existence of stable distributions of the total profit is guaranteed and as a result the collaboration among manufacturers is a win–win deal.Ministerio de Economía y Competitividad | Ref. MTM2014-54199-PMinisterio de Economía y Competitividad | Ref. MTM2014-53395-C3-3-PFundación Séneca | Ref. 19320/PI/1

Bankruptcy-based Radio Resource Management for Multimedia Mobile Networks

The transmission of bandwidth demanding multimedia applications in capacity constrained mobile radio networks requires optimizing the usage and assignment of radio resources following the varying Quality of Service (QoS) requirements characteristics of multimedia traffic environments. Considering the capacity of bankruptcy theory to deal with situations where the demand for resources is higher than its availability, this work proposes the application of bankruptcy theories to design efficient radio resource management policies that provide the highest possible QoS levels while guaranteeing user fairnes