‘I want to ride my bicycle’: delimiting cyclist typologies

Based around fieldwork in Seville (Spain), our article provides an empirical analysis with the aim of determining whether different typologies of cyclists exist depending on the type of bicycle for urban commuting (public bicycle/private bicycle). Our findings show that users of public bicycles are predominantly male, young, with a high level of education, and basically use the public bicycle for subsistence trips due to its easy intermodality; while private bicycle riders are mainly females who regularly make nonsubsistence trips and prefer a more flexible bicycle for their daily needs.     

The view from above: the relevance of shared aerial drone videos for destination marketing

ABSTRACT

The use of drones to produce videos has generated a large amount of visually appealing footage of various destinations. They attract much attention, but there are issues that affect their production, and their relevance to destination marketing. This research examines YouTube meta-data and spatial overlay analysis of shared aerial drone videos from the United Kingdom (UK). The results suggest that shared aerial drone videos have some unique user-generated content (UGC) characteristics and their spatial distribution tends to favor more populated areas. Theoretical and practical implications for destination marketing are further discussed.     

Three ethical frames of reference: insights into Millennials' ethical judgements and intentions in the workplace

The paper investigates the ethical decisions of Millennials, who are not only part of an expanding cohort of the workforce, but also represent potential future managers with a growing influence on work practices and employment relationships. In the conceptual model, we propose that three ethical frames of reference, represented by perceived organisational ethics, perceived employee ethics and reflective moral attentiveness, antecede ethical judgements, which further influence the ethical intentions of Millennials. Using structural equation modelling, we test the model for three different business ethics scenarios: paying a consulting fee, dumping hazardous waste, and running an offensive advertising campaign. The findings confirm the link between ethical judgements and intentions across the board, while the influence of the ethical frames of reference varies among the scenarios. We propose that the differences in the predictive ability of the ethical frames of reference depend on the nature of the ethical issue, which holds important implications for today's managers in their attempts to encourage ethical behaviour of Millennial employees.     

The Impact Of Business Intelligence Systems on an Organization’s Effectiveness: The Role of Metadata Quality From a Developing Country’S View

ABSTRACT

Business Intelligence (BI) systems are extensively used by large hotels in Jordan; however their effectiveness has not yet been researched. The aim of this research is to explore the relationships among definitional metadata quality, data quality metadata quality, navigational metadata quality, lineage metadata quality, perceived ease of use, perceived usefulness and system effectiveness in enhancing organizational effectiveness of five star hotels in Aqaba, Jordan. To test the research hypotheses, 225 usable responses containing 37 items were analyzed using structural equation modeling (SEM) and a Machine Learning technique. Results suggest that organizational effectiveness was directly and positively affected by perceived usefulness and BI systems effectiveness. Nevertheless, perceived usefulness did not impact BI systems effectiveness.     

Saliency of outside options in the lost wallet game

This paper reports an experiment designed to shed light on an empirical puzzle observed by Dufwenberg and Gneezy (Games and Economic Behavior 30:163–182, 2000) that the size of the foregone outside option by the first mover does not affect the behavior of the second mover in a lost wallet game. Our conjecture was that the original protocol may not have made the size of the forgone outside option salient to second movers. Therefore, we change two features of the Dufwenberg and Gneezy protocol: (i) instead of the strategy method we implement a direct response method (sequential play) for the decision of the second mover; and (ii) we use paper money certificates that are passed between the subjects rather than having subjects write down numbers representing their decisions. We observe that our procedure yields qualitatively the same result as the Dufwenberg and Gneezy experiment, i.e., the second movers do not respond to the change in the outside option of the first movers.     

Foreign News and Spillovers in Emerging European Stock Markets

We analyze foreign news and spillovers in the emerging EU stock markets (the Czech Republic, Hungary, and Poland). We employ high‐frequency five‐minute intraday data on stock market index returns and four classes of EU and US macroeconomic announcements during 2004–07. We account for the difference of each announcement from its market expectation and we jointly model the volatility of the returns accounting for intraday movements and day‐of‐the‐week effects. Our findings show that intraday interactions on the new EU markets are strongly determined by mature stock markets as well as the macroeconomic news originating thereby. We show that strong contemporaneous links across markets are present even after controlling for macroeconomic announcements. Finally, in terms of specific announcements, we are able to show the exact sources of macro news spillovers from the developed foreign markets to the three new EU markets under research.     

Natural estimation of variances in a general finite discrete spectrum linear regression model

The method of “natural” estimation of variances in a general (orthogonal or nonorthogonal) finite discrete spectrum linear regression model of time series is suggested. Using geometrical language of the theory of projectors a form and properties of the estimators are investigated. Obtained results show that in describing the first and second moment properties of the new estimators the central role plays a matrix known in linear algebra as the Schur complement. Illustrative examples with particular regressors demonstrate direct applications of the results.     

Variable neighborhood search heuristic for nonconvex portfolio optimization

Abstract

In this article we consider a portfolio optimization problem under multiple real-world constraints, such as: cardinality constraints, tracking error, active share, and turnover. We propose a heuristic based on variable neighborhood search (VNS) that effectively addresses additional constraints that introduce non-convexities. In the VNS-based heuristic, several neighborhood structures are introduced and fast local search is implemented. We develop a VNS portfolio rebalancing framework (VNS-PRF) with two rebalance strategies. Data sets provided by a financial investment firm are used to evaluate the validity and reliability of the proposed VNS-PRF. Computational experiments and different portfolio performance measures indicate that our approach is able to obtain solutions with competitive quality and can be applied on large-scale data sets.