Exploratory data structure comparisons: three new visual tools based on principal component analysis

Datasets are sometimes divided into distinct subsets, e.g. due to multi-center sampling, or to variations in instruments, questionnaire item ordering or mode of administration, and the data analyst then needs to assess whether a joint analysis is meaningful. The Principal Component Analysis-based Data Structure Comparisons (PCADSC) tools are three new non-parametric, visual diagnostic tools for investigating differences in structure for two subsets of a dataset through covariance matrix comparisons by use of principal component analysis. The PCADCS tools are demonstrated in a data example using European Social Survey data on psychological well-being in three countries, Denmark, Sweden, and Bulgaria. The data structures are found to be different in Denmark and Bulgaria, and thus a comparison of for example mean psychological well-being scores is not meaningful. However, when comparing Denmark and Sweden, very similar data structures, and thus comparable concepts of well-being, are found. Therefore, inter-country comparisons are warranted for these countries.     

Location of Public Goods and the Calculus of Voting: The Seattle Monorail Referendum*

Objectives. In this article we explore how the geographic location of a proposed public good on the ballot in a local referendum influences voting turnout. We argue that voters who live farther away from the good, and are thus likely to bear the cost of the good but have no access to it, would be more motivated to turn out in the election. Drawing on the cost‐orientation hypothesis, or negativity effect, “that people are more strongly motivated to avoid losses than to approach gains,” we expect these voters to derive higher expressive benefits from the act of voting relative to those of voters located closer to the good. Methods. We examine voting turnout in the 2002 referendum in the City of Seattle on the proposed construction of a monorail. We conduct our study at the precinct level using spatial tools of analysis. We evaluate the effect of accessibility on turnout by means of a curvilinear model that incorporates demographic and political variables. Results. We find that voting turnout is determined partly by accessibility. Turnout is higher in precincts located farther away from the monorail line than in precincts located relatively closer to the line. Partisanship conditions this effect. Conclusions. This study provides tentative support for linking voter turnout to the negativity effect via expressive benefits. Voters' location in relation to a public good may affect directly their political behavior by means of their perceived net gains or losses from the good.     

Riemann sums for MCMC estimation and convergence monitoring

This paper develops an extension of the Riemann sum techniques of Philippe (J. Statist. Comput. Simul. 59: 295–314) in the setup of MCMC algorithms. It shows that these techniques apply equally well to the output of these algorithms, with similar speeds of convergence which improve upon the regular estimator. The restriction on the dimension associated with Riemann sums can furthermore be overcome by Rao–Blackwellization methods. This approach can also be used as a control variate technique in convergence assessment of MCMC algorithms, either by comparing the values of alternative versions of Riemann sums, which estimate the same quantity, or by using genuine control variate, that is, functions with known expectations, which are available in full generality for constants and scores.     

'Working at Disability': a qualitative study of the meaning of health and disability for women with physical impairments

Seven women with cerebral palsy and one woman with a spinal cord injury were interviewed about the meaning of health and disability in their lives. The most compelling feature of their narratives was the pressure to define their health by able-bodied standards. These women 'worked at' fitting their bodies and experiences into the limited societal understanding of a body. Paradoxically, the women seemed to come to a deeper personal understanding of disability and themselves through this work. The women's stories of health, impairment and disability, as told in the interviews, blended into rich chapters of their life stories.     

Eyes on the Block: Measuring Urban Physical Disorder Through In-Person Observation

In this paper, we present results from measuring physical disorder in Los Angeles neighborhoods. Disorder measures came from structured observations conducted by trained field interviewers. We examine inter-rater reliability of disorder measures in depth. We assess the effects of observation conditions on the reliability of reporting. Finally, we examine the relationships between disorder, other indicators of neighborhood status, and selected individual outcomes.Our results indicate that there is considerable variation in the level of agreement among independent observations across items, although overall agreement is moderate to high. Durable indicators of disorder provide the most reliable measures of neighborhood conditions. Circumstances of observation have statistically significant effects on the observers’ perceived level of disorder. Physical disorder is significantly related to other indicators of neighborhood status, and to children’s reading and behavior development.This result suggests a need for further research into the effects of neighborhood disorder on children.     

Language as an issue in international internal communication: English or local language? If English,what English?

The present paper discusses internal communication in the global context, with a focus on language as an issue for the organization. Although ‘language’, naturally, is a resource that enables any – internal or other – communication, it has not been examined in public relations research but has been taken for granted or as given. The current pace of globalization in all sectors has rapidly globalized internal communication and the language issue needs to be addressed. On the basis of two empirical studies we discuss language strategy and language use in international internal communication. Our findings show that although a common ‘corporate language’ – which mostly today refers to English – enables internal communication, it is not a straightforward solution but a number of issues need to be considered. For example, as international communication in a business context is today mostly conducted by non-native speakers of English, their language can be characterized as BELF (English as Business Lingua Franca), which differs from ‘standard English’ in many ways. Also, language issues need to be considered for organizational credibility and knowledge sharing and for constructing trust and rapport in international interaction.