A usability gap between older adults and younger adults on interface design of an Internet-based telemedicine system

Internet-based telemedicine is becoming an effective tool to deliver home-healthcare services and health information on demand, especially in rural areas, where there is often a large elderly population with greater rates of preventable chronic diseases. However, the designs of current interfaces for these internet-based telemedicine systems do not take elderly user characteristics into consideration. This study conducted usability testing on the interface of an internet-based telemedicine system using two different age groups, young adults and older adults. Differences in overall performance and satisfaction between the two groups were identified. Based on these results, a future direction is suggested for the interfaces of Internet-based telemedicine systems.     

Labor Unions and Life Satisfaction: Evidence from New Data

While a growing literature demonstrates the impact of socio-political factors on citizens’ quality of life, scholars have paid comparatively little attention to the role political organizations such as labor unions play in this regard. We examine labor organization as a determinant of cross-national variation in life satisfaction across a sample of advanced industrial polities. Our findings strongly suggest that unions increase the life satisfaction of citizens, and that that this effect holds for non-union members as well. Moreover, we also find that labor organization has the strongest impact on the subjective well-being of citizens with lower incomes. We confirm these hypotheses using both individual and aggregate-level data from fourteen nations. We show these relationships to have an independent and separable impact from other economic, political, and cultural determinants. The implications for the study of life satisfaction and of labor unions as political actors in general are discussed.     

Hostage taking: Understanding terrorism event dynamics

This paper employs advanced time series methods to identify the dynamic properties of three hostage taking series. The immediate and long run multipliers of three covariates—successful past negotiations, violent ends, and deaths—are identified. Each hostage series responds differently to the covariates. Past concessions have the strongest impact on generating future kidnapping events, supporting the conventional wisdom to abide by a stated no-concession policy. Each hostage series has different changepoints caused by a variety of circumstances. Skyjackings and kidnappings are negatively correlated, while skyjackings and other hostage events are positively correlated. Policy recommendations are offered.     

The Middle‐class in the German Welfare State: Beneficial Involvement at Stake?

The working‐class is typically regarded as the driving force of welfare state development. Yet, some argue that the middle‐classes' beneficial involvement in the welfare state is crucial for its financial sustainability and popular legitimacy. Against this backdrop, we investigate how recent welfare state reforms in Germany which affect the status of the middle‐class are viewed and discussed by this group. Germany is a particularly interesting case because its welfare state is seen to be centred on the desires of the middle‐class, especially through its focus on status maintenance and horizontal redistribution over the life‐course. However, the move from status maintenance to minimum income support in unemployment provision and the strengthening of private old age provision challenge this assumption. Thus, we ask how the German middle‐class views the emerging abandonment of the principle of status maintenance and the shift from collective to individual responsibility. Based on qualitative material from focus groups, we find that individual responsibility is generally supported, but that the state is still assigned responsibility for providing basic levels of social security. Furthermore, for those groups seen as less capable of acting individually responsible (e.g. the poor or long‐term unemployed) the ‘inducement’ of – or assistance for – individually responsible behaviour by the state is demanded. Overall, while the principle of ‘individual responsibility’ seems to find some resonance among the middle‐class members interviewed, they still try to balance individual and collective responsibility.     

Determining Sample Size Using Fast and Slow Thinking

ABSTRACT

Using SPSS's bootstrapping procedures, this article demonstrates an approach to determining sample size that combines fast (heuristics or rules-of-thumb) and slow (statistical power analysis) thinking to balance statistical power, precision, and practicality. Sample size is determined for six commonly used statistical procedures: independent groups t-test, one-way ANOVA, one-way MANOVA, Pearson's r correlation, linear regression, and logistic regression. Overall, findings suggest that both approaches may under or over-estimate sample size. Both approaches yielded similar parameter and confidence interval estimates, but varied, sometimes by a factor of two, in their sample size requirements. It is hoped that this study's procedure and results will provide beginning reference points for sample size determination, and encourage researchers continue to search for resolutions for often difficult sample-size decisions.     

Should I Stay or Should I Go? Explaining Turnover Intentions with Organizational Identification and Job Satisfaction*

The social identity approach is a powerful theoretical framework for the understanding of individuals' behaviour. The main argument is that individuals think and act on behalf of the group they belong to because this group membership adds to their social identity, which partly determines one's self‐esteem. In the organizational world, social identity and self‐categorization theories state that a strong organizational identification is associated with low turnover intentions. Because identification is the more general perception of shared fate between employee and organization, we propose that the relationship between identification and turnover will be mediated by job satisfaction as the more specific evaluation of one's task and working conditions. In four samples we found organizational identification feeding into job satisfaction, which in turn predicts turnover intentions.     

On edge orienting methods for graph coloring

We consider the problem of orienting the edges of a graph so that the length of a longest path in the resulting digraph is minimum. As shown by Gallai, Roy and Vitaver, this edge orienting problem is equivalent to finding the chromatic number of a graph. We study various properties of edge orienting methods in the context of local search for graph coloring. We then exploit these properties to derive four tabu search algorithms, each based on a different neighborhood. We compare these algorithms numerically to determine which are the most promising and to give potential research directions.     

Value drivers of social businesses: A business model perspective

Hybrid organizational forms that combine commercial and welfare institutional logics play an increasingly important role in addressing the grand societal challenges we face today. Building on the literatures on hybrid organizations and social business models, we explore the characteristics of social businesses from a business model perspective. This study seeks to better understand the particularities and value drivers of hybrid social purpose in contrast to purely commercial business models. We follow a grounded theory approach and our findings are based on interview data from 17 social business firms. Building on social businesses' identified particularities, we propose four value drivers of social business models: 1) responsible efficiency, 2) impact complementarities, 3) shared values, and 4) integration novelties. We link our findings to the literature, contributing new insights into social businesses models and implications for practitioners.     

Wisdom of the crowd and capabilities of a few: internal success factors of crowdsourcing for innovation

Crowdsourcing has been demonstrated to be an effective strategy to enhance the efficiency of a firm’s innovation process. In this paper, we focus on tournament-based crowdsourcing (also referred to as “broadcast search”), a method to solve technical problems in form of an open call for solutions to a large network of experts. Based on a longitudinal study of six companies piloting this application of crowdsourcing, we identify barriers and sources of resistance that hinder its implementation in firms. Our paper contributes to the state of research by analyzing crowdsourcing on the level of pilot projects, hence providing a workflow perspective that considers the creation of dedicated processes and operations of crowdsourcing. This project level analysis enables the identification of specific challenges managers face when implementing crowdsourcing within an established R&D organization. Following a design science approach, we derive suggestions for organizational interventions to overcome these barriers. We find that dedicated promoter roles strongly contribute to a successful implementation of crowdsourcing, turning pilot projects into an organizational routine.