Equilibria with vector-valued utilities and preference information. The analysis of a mixed duopoly

This paper deals with the equilibria of games when the agents have multiple objectives and, therefore, their utilities cannot be represented by a single value, but by a vector containing the various dimensions of the utility. Our approach allows the incorporation of partial information about the preferences of the agents into the model, and permits the identification of the set of equilibria in accordance with this information. We also propose an additional conservative criterion which can be applied in this framework in order to predict the results of interaction. The potential application of the theoretical results is shown with an analysis of a mixed oligopoly in which the agents value additional objectives other than their own benefit. These objectives are related to social welfare and to the profit of the industry. The flexibility of our approach provides a general theoretical framework for the analysis of a wide range of strategic economic models.     

Analysis of the lifted weight including height and frequency factors for workers in Colombia

Factors related to the height of the load and the frequency of handling have become a way to predict the acceptable standard weight lifted for workers whose main task is the manual lifting of materials and measuring the conditions is important to determine a maximum weight lifted. This study was conducted to twenty (20) workers between eighteen (18) and forty (40) years old with a minimum six months experience and belonging to the warehouse and packaging area of a dairy products company. Consideration was given to three different heights such as knuckle, shoulder and total height as well as frequencies of 2, 4 and 6 times per minute. Average values for lifted weight were 17.9306 ± 2.37 kg. The conclusions and recommendations included a review of legislation related to Colombian maximum acceptable weight of lifting due to the current law does not match the acceptable weight handled in this research.     

A Tapestry of Edgelands: Defining Carceral Edgeland(s) in Masafer Yatta (Firing Zone 918)

The carceral edgeland occupies a unique position. At times, it is acknowledged; at others, it remains unseen by those outside its boundaries. In cases where the edgeland is architectural, such as a prison or a detention center, it can prompt viewers to consider the power dynamics exercised within. This article, however, is concerned with the possibilities for the edgeland to be moveable and embodied. Focusing on the transformation of the area of Masafer Yatta in the occupied West Bank into a military training zone, the article shifts the discourse from the connection between the edgeland and the symbolic power of carceral architecture to suggest alternative carceral edgelands: the occupying edgeland, wherein the moveable and embodied converge to form a tapestry of edgelands. The Israeli military presence varies in intensity, yet the result is the realization of Achille Mbembe's ‘infrastructural warfare’ (2003) that manifests through the moveable edgeland, and second, the embodied edgeland that is enacted by the military personnel who symbolize the state. In Masafer Yatta, the army's long-term presence has had an impact on the communities that evokes Lauren Berlant's ‘political depression’ (2011). Building on Paul Farley and Michael Symmons Roberts' recognition of multitudinous edgelands (2012), this article suggests that there can be multiple carceral edgelands at one site, all of which facilitate exclusion and political depression through enclosure, whether through fences, walls, or moveable checkpoints.     

International students' experiences of living temporarily abroad: Sense of belonging toward community well-being

This article unveils the voices of the international students of the Universiti Sains Malaysia by exploring their belongingness and community well-being in Malaysia. This study was conducted with 14 international students (seven males and seven females) studying at the Universiti Sains Malaysia for at least a year. A qualitative approach was employed using in-depth case interviews to examine the socio-cultural challenges they experienced while studying abroad. The specific challenges reported among the international students are their well-being in distinct aspects such as physical, mental, and emotional. This study seeks to explore the international students' reliability on conational communities for social support. When achieving belongingness with their conational friends, international students can flourish well in their current community in Malaysia, thus achieving social community well-being although they are far away. Besides maintaining established close friendships, the international students develop a sense of comfort and familiarity by forming new friendships with conational and other international students. Sharing similar backgrounds and nationalities, as well as experiences and struggles, are significant for international students in maintaining close friendships and situational harmony. This study highlighted the meaning behind physical and emotional distance, as well as the situation of “being temporarily abroad” and its relations to intimacy practices and belongingness in close friendships. The results presented in this article contribute to an increasing understanding of international students' challenges and the future of social harmony and community well-being while temporarily living in Malaysia. Correspondingly, as a result of this study, students will be more deferential of cultural differences and cross-cultural sensitivity, which will also help to decrease prejudice and discrimination.     

Risk Perception and Technological Development at a Societal Level

This article tests the hypothesis that the exposure to the threat to societies posed by the introduction of new technologies is associated with a normalization of risk perception. Data collected in 2000 by the International Social Survey Programme (ISSP) on environmental issues were used to explore this hypothesis. Representative samples from 25 countries were employed to assess the national levels of perceived threat to the environment associated with a series of technologies and activities. These values were correlated with economic indicators (mainly from the World Bank) of the diffusion of each of the technologies or activities in each country. Results indicate a negative association of risk perception with the level of technological prevalence (societal normalization effect) and a positive association with the rate of growth of the technology (societal sensitivity effect). These results indicate that the most acute levels of perceived environmental risk are found in those countries where the level of technological prevalence is low but where there has recently been substantial technological development. Environmental awareness is a mediator of the relationship between risk perception and the indices of technological diffusion. This result means that: (1) societal normalization of risk is not a direct consequence of prevalence of the technology, but is driven by awareness of technological development and that (2) societal sensitivity to risk is associated with lower levels of environmental awareness.     

Site-specific focus groups: analysing learning spaces in situ

This article reflects on the focus group as a research technique used in an analysis of the relationship between learning spaces and pedagogy, developed as part of the assessment of the secondary school modernisation programme in Portugal. The research proposes a methodological innovation in the use of focus group, by developing focus groups before, during and after tours to the schools. The focus groups in this format were particularly important for the research since they facilitated a dynamic of social interaction and the expression of views and opinions among groups of pupils and teachers about the impact of the renovations on education practices. They also highlighted some of the specific aspects of the interaction between the appropriation processes and the object of the intervention, which was in itself object of contradictory interpretations. Further, this technique enables the attainment of a triangulation strategy, central to the study.     

Coherent Mortality Forecasting: The Product-Ratio Method With Functional Time Series Models

When independence is assumed, forecasts of mortality for subpopulations are almost always divergent in the long term. We propose a method for coherent forecasting of mortality rates for two or more subpopulations, based on functional principal components models of simple and interpretable functions of rates. The product-ratio functional forecasting method models and forecasts the geometric mean of subpopulation rates and the ratio of subpopulation rates to product rates. Coherence is imposed by constraining the forecast ratio function through stationary time series models. The method is applied to sex-specific data for Sweden and state-specific data for Australia. Based on out-of-sample forecasts, the coherent forecasts are at least as accurate in overall terms as comparable independent forecasts, and forecast accuracy is homogenized across subpopulations.     

Moment identity for discrete random variable and its applications

In this paper, we obtain a moment identity applicable to a general class of discrete probability distributions. We then derive the corresponding identities for modified power series, Ord and Katz families. It is noted that the proposed identity has potential applications in different fields.     

On the Dirichlet distributions on symmetric matrices

In this paper, we introduce a generalization of the Dirichlet distribution on symmetric matrices which represents the multivariate version of the Connor and Mosimann generalized real Dirichlet distribution. We establish some properties concerning this generalized distribution. We also extend to the matrix Dirichlet distribution a remarkable characterization established in the real case by Darroch and Ratcliff.