The effects of water temperature in aquaculture management

This study examines the impact of water temperature on the optimal management of the ration size and fish weight in off-shore farm aquaculture. A model for the expected returns of the farm is developed which includes a fish growth function influenced by fish weight, the ration size and water temperature. The output transportation cost has an ambiguous effect on the harvesting size, but the impact of water temperature is positive. These results explain empirical evidence in the Canary Islands that unfavourable economic conditions could be overcome by environmental advantageous conditions raising productivity.     

Impact of Customer Orientation and ICT Use on the Perceived Performance of Rural Tourism Enterprises

This article sets out to highlight the importance of adopting customer orientation and information and communications technology (ICT) in tourism service delivery if the rural tourism sector is to succeed. A model is proposed and validated which encompasses the effects of customer orientation adoption and the use of ICT on the rural tourism sector, taking into account the enterprises’ financial results, improvements to the rural destination, and the more personal, intangible impact on the owner-manager. The major contributions of this work are in finding that customer orientation adoption that contributes to ICT use, and that both ICT use and customer orientation adoption contribute to better outcomes from rural tourism activity.     

An independent assessment of the unidimensionality,reliability, validity and factor structure of the LibQUAL+™ scale

This empirical study provides a thorough measurement analysis of the LibQUAL+? scale for measuring library service quality. In particular, the study assesses the unidimensionality of the scale, the scale's psychometric properties and its factor structure. Data were gathered using a self-administered questionnaire distributed to a sample of university library users: 189 in Canada and 374 in Mexico. Using confirmatory factor analysis (CFA), the study confirms the assumption of unidimensionality in only two of the three current sub-dimensions of the scale. The results of this study also show that the LibQUAL+? scale consists of four dimensions. The remainder of the CFA results in the study provides strong support for the general reliability and validity of the four-dimensional structure.     

Value co-creation via information and communications technology

The aims of the present work centre on determining whether co-created value constitutes a competitive advantage for firms, and whether it is capable of influencing consumer behaviour. Applying the service-dominant logic perspective, the work examines the firm's capabilities in the context of its business-to-customer (B2C) interactions, focusing on information and communications technology (ICT) as a particular driver of value co-creation. Taking this B2C perspective, ICT is measured, from the firm's point of view, and customer perceptions are analysed, using the variables ‘value co-creation’, ‘perceived value’ and ‘loyalty’. The sample consists of 100 service firms and 572 of their customers. The findings indicate that ICT capabilities have a direct effect on value co-creation, as does value co-creation on perceived value and loyalty.     

Samuelson and Davidson on ergodicity: A reformulation

The concept of ergodicity in economics seems to have the qualities of a shibboleth—a word or saying used by adherents of a party, sect, or belief, and usually regarded by others as empty of real meaning. It is in use by both neoclassical economics—after Samuelson (1965 Samuelson, P. A. “Proof That Properly Anticipated Prices Fluctuate Randomly.” Industrial Management Review, 1965, 6 (2), 41–49.[Web of Science ®] , [Google Scholar], p. 43), who used the term in his paper on what later became a foundation of the efficient market hypothesis—and post Keynesian economics—after Davidson, who picked up the term in order to highlight methodological differences. Considering the origin of the concept in statistical physics and its use in the topology of dynamical systems, which most economists are not conversant with, the importance ascribed to ergodicity in economic debate seems mystifying. We deconstruct the meaning of the term in the major contributions of Samuelson and Davidson. We suggest an alternative to (non)ergodicity to discuss the nature of randomness in the real world. While neoclassical theory assumes stochastic randomness, post Keynesians assume nonstochastic randomness, a term developed by the mathematician Kolmogorov (1986 Kolmogorov, A.N. “On the Logical Foundations of Probability Theory.” In K. Ito, and J.V. Prokhorov (eds.), Probability and Mathematical Statistics, Moscow, 1986, pp. 467–471. [Google Scholar], p. 467). We argue that even in an ergodic world there is a problem with the idea that stochastic randomness can be dealt with by the financial system.     

The Causes of Urban Sprawl in Spanish Urban Areas: A Spatial Approach

This paper explores the presence of local spatial interaction on urban development patterns of Spanish urban areas and whether this interaction might be due to the strategic behaviour of neighbouring local governments. Using remote-sensing data from aerial photography and satellite imaging along with Geographic Information Systems (GIS) techniques, it studies urban development patterns across the country with unprecedented detail. The results confirm the main hypothesis that spatial interaction exists in the levels of sprawl between neighbouring municipalities, suggesting that local governments do indeed compete for the creation of new suburban settlement developments, hence promoting excessive urban sprawl.     

How does qualitative data collection modality affect disclosure of sensitive information and participant experience? Findings from a quasi-experimental study

Quality & Quantity - Focus groups (FGs) and individual interviews (IDIs) can be conducted in-person or in several different online contexts. We conducted a quasi-experimental study and assessed...     

Playing the trust game with other people’s money

We experimentally investigate to what extent people trust and honor trust when they are playing with other people’s money (OPM). We adopt the well-known trust game by Berg et al. (in Games Econ. Behav. 10:122–142, 1995), with the difference that the trustor (sender) who sends money to the trustee (receiver) does this on behalf of a third party. We find that senders who make decisions on behalf of others do not behave significantly different from senders in our baseline trust game who manage their own money. But receivers return significantly less money when senders send a third party’s money. As a result, trust is only profitable in the baseline trust game, but not in the OPM treatment. The treatment effect among the receivers is gender specific. Women return significantly less money in OPM than in baseline, while there is no such treatment effect among men. Moreover, women return significantly less than men in the OPM treatment.     

Achievement predictors in a secondary students’ sample

In this study several factors that influence academic achievement are going to be presented. 492 students, 190 men and 302 women, with ages from 12 to 18?years old, and from the first and third year of compulsory secondary school and the first year of voluntary secondary school have participated, completing four questionnaires about IQ, motivation, learning strategies, adjustment and study habits. The academic marks selected to be related with the questionnaires we have mentioned before were the Mathematic, Spanish Language and Grammar, English language and Physical Education. We applied the structural equation analysis, by LISREL procedure, to find the best explanatory model about the academic achievement predictors. The results show that the learning strategies and the personal adjustment do not predict the academic performance as much as the intelligence, the motivation and the study habits. Therefore, it is very important to consider these variables as predictors in the works and research, of adolescents?? achievement.     

Rothschilds' strategies in international non‐ferrous metals markets, 1830–1940

The aim of this article is to analyse the strategies employed by the Rothschilds up to 1940 to gain control and limit competition in the international non‐ferrous metals markets. It examines how they opted for inelastic demand products of highly concentrated supply which lent themselves to market control (mercury, nickel, lead, and copper and sulphur) by taking administrative monopolies (mercury from the state‐owned Almadén mines in Spain) or by controlling the leading businesses of the respective markets (Le Nickel, Peñarroya, and Rio Tinto). The article also analyses how in some cases the family was able to gain worldwide monopolies, and how in other cases they promoted collusive oligopolies with the competition in any number of forms in their quest to maintain profitability and steer well clear of any competition.