Improving the Forward Link of the Future Airport Data Link by Space-Time Coding

In the context of the future communication system for the airport surface operations (AeroMACS), we investigate the 2×1 Alamouti scheme applied to the 802.16e standard for improving the performance of the forward link. We propose a novel space-time coding realization which preserves the original frame structure of WiMAX, analyzing its performance in a realistic airport environment. Simulation results show the performance of the system over different scenarios

Competitiveness and sustainability in tourism industry: the "albergo diffuso" case study

The objective of the analysis developed in this paper is to verify whether the sustainability of the hotel ospitality model contributes to the competitiveness of tourist destinations. The research question is: does the model of “albergo diffuso” satisfy the requirement for a social, economic and environmental sustainability? The research method adopted consisted in a survey with the submission of a questionnaire to a number of alberghi diffusi operating worldwide, that is 130 units of analysis. The submission period went from October to December 2016. Through the questionnaire submitted to the interviewees it has been possible to analyze the motivation for the business start-up as well as the characteristics of the entrepreneur, the managerial systems and the governance style. The results will be analyzed through the application of the Weaver model (2014; 2017) which is considered essential to evaluate the contribution of the albergo diffuso to tourism sustainability. The implementation of the Weaver matrix to evaluate the contribution of the albergo diffuso to the sustainability of a tourist destination is the original element of the paper. The paper discusses the implications of sustainability with particular regards to the “albergo diffuso”. Therefore, it would be suitable to expand the analysis to additional models of tourist hospitality present in the international tourism scenario

How vague can one be? Rational preferences without completeness or transitivity

What can it mean for preferences to be rational when transitivity or completenss are not assumed? In this paper we provide a framework and a set of conditions to deal with this question. We provide representation results in terms of a pair of functions, a utility function and a vagueness function.incomplete preferences, vagueness, sure-thing principle

Choice by Lexicographic Semiorders

We propose an extension of Tversky's lexicographic semiorder to a model of boundedly rational choice. We explore the connection with sequential rationalisability of choice, and we provide axiomatic characterisations of both models in terms of observable choice data.lexicographic semiorders, bounded rationality, revealed preference, choice

Two-stage Bargaining Solutions

We introduce and characterize a new class of bargaining solutions: those which can be obtained by sequentially applying two binary relations to eliminate alternatives. As a by-product we obtain as a particular case a partial characterization result by Zhou (Econometrica, 1997) of an extension of the Nash axioms and solution to domains including non-convex problems, as well as a complete characterizations of solutions that satisfy Pareto optimality, Covariance with positive affine transformations, and Independence of irrelevant alternatives.Bargaining, Non-convex problems, Nash bargaining solution

Alliances and Negotiations

A characteristic of many bargaining situations is that the negotiators represents the interests of a set of parties (trade unions, political parties, etc.) with composite interests, whose bargaining behaviour is regulated by some collective decision mechanism. In this paper we provide a natural model of such circumstances, and show how different preference aggregation procedures within the composite player affect the bargaining outcome. In particular we find that unanimity procedures lead to 'more aggressive' behaviour than majority procedures, and that procedures which introduce minimum safeguards for the members of an alliance may result in agreements that are worse than without those safeguards.Alliances, multiperson bargaining

Consumer Choice and Revealed Bounded Rationality

We study two boundedly rational procedures in consumer behavior. We show that these procedures can be detected by conditions on observable demand data of the same type as standard revealed preference axioms. This provides the basis for a non-parametric analysis of boundedly rational consumer behavior mirroring the classical one for utility maximization.Bounded rationality, Revealed preference, Consumer choice

Choice by lexicographic semiorders

In Tversky's (1969) model of a lexicographic semiorder, preference is generated by the sequential application of numerical criteria, by declaring an alternative x better than an alternative y if the first criterion that distinguishes between x and y ranks x higher than y by an amount exceeding a fixed threshold. We generalize this idea to a fully-fledged model of boundedly rational choice. We explore the connection with sequential rationalizability of choice (Apesteguia and Ballester 2009, Manzini and Mariotti 2007), and we provide axiomatic characterizations of both models in terms of observable choice data.Lexicographic semiorders, bounded rationality, revealed preference, choice