Generalized spatial regression with differential regularization

ABSTRACT

We aim at analysing geostatistical and areal data observed over irregularly shaped spatial domains and having a distribution within the exponential family. We propose a generalized additive model that allows to account for spatially varying covariate information. The model is fitted by maximizing a penalized log-likelihood function, with a roughness penalty term that involves a differential quantity of the spatial field, computed over the domain of interest. Efficient estimation of the spatial field is achieved resorting to the finite element method, which provides a basis for piecewise polynomial surfaces. The proposed model is illustrated by an application to the study of criminality in the city of Portland, OR, USA.     

Digital publishing: tools and products

Summary Electronic publications are not accessible without technical aids and need constant, time consuming attention; a look back at the data media and data formats utilized in the past 25 years illustrates this. Recently, an increasing number of conferences and studies address the problem. Use of standard data formats, media and platform independence of data, as well as data centering instead of process centering are requirements for long-term availability. For the humanities, texts are not only the sources of information but also objects of scholarly investigation. Therefore publication in a presentation format only is not sufficient. In addition to more sophisticated tools for analysis, search and navigation, a form of publication is required which does not focus on layout but gives easy access to the content and structure of the published document. Both for the creation and the scholarly evaluation of such documents, tools are required which offer additional functions compared to those provided by commercial publication and access tools. The necessary flexibility is guaranteed by the provision of basic functions of text data processing which do not anticipate or preclude any particular questions. This is illustrated by examples for the evaluation and preparation of digital texts.

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Zusammenfassung Elektronische Publikationen sind nicht ohne technische Hilfsmittel zug?nglich und bedürfen st?ndiger aufw?ndiger Pflege; ein Rückblick auf in den letzten 25 Jahren verbreitete Datentr?ger und Datenformate veranschaulicht dies. In jüngster Zeit ist das Problem vermehrt Gegenstand von Kongressen und Studien. Verwendung von Standard-Datenformaten, Medienneutralit?t und Plattformunabh?ngigkeit der Daten sowie Daten-Zentrierung statt Prozess-Zentrierung sind Voraussetzungen für l?ngerfristige Verfügbarkeit. Für die Geisteswissenschaften sind Texte nicht nur Informationsquellen, sondern selbst Gegenstand wissenschaftlicher Untersuchungen. Deshalb reicht die Publikation in einem Pr?sentationsformat nicht aus. Neben ausgefeilteren Erschlie?ungs-, Such- und Navigationsinstrumenten wird eine Form der Publikation gefordert, bei der nicht das Layout in Vordergrund steht, sondern auch Inhalt und Struktur der publizierten Dokumente zug?nglich sind. Sowohl für die Erstellung als auch für die wissenschaftliche Auswertung solcher Dokumente werden Werkzeuge ben?tigt, deren Funktionsumfang über den kommerzieller Publikations- und Zugriffswerkzeuge hinausgeht. Die notwendige Flexibilit?t wird durch die Bereitstellung von Grundfunktionen der Textdatenverarbeitung gew?hrleistet, die keine bestimmte Fragestellung vorwegnimmt oder ausschlie?t. Dies wird an zwei Beispielen zur Auswertung und zur Vorbereitung elektronisch verfügbarer Texte aufgezeigt.

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Résumé Les publications électroniques ne sont pas accessibles sans auxiliaires techniques et nécessitent un entretien minutieux et constant ; un regard sur les supports et formats de données des 25 dernières années en témoigne. Plus récemment, le problème est l’objet de congrès et d’études. L’utilisation de formats de données standard, la neutralité des médias et des données indépendantes de plates-formes, de même que le centrage sur les données au lieu du centrage sur les processus sont les conditions d’une disponibilité à long terme. Pour les sciences humaines, les textes ne sont pas seulement source d’information, mais font eux-mêmes l’objet d’études scientifiques. C’est pourquoi leur publication dans un seul format de présentation ne suffit pas. Outre les instruments d’étude, de recherche et de navigation, il est nécessaire de disposer d’une forme de publication qui ne mette pas la présentation au premier plan, mais qui donne également accès au contenu et à la structure des documents publiés. Tant l’élaboration que l’analyse scientifique de tels documents requièrent des outils dont l’étendue excède ce que proposent les outils de publication et d’accès commerciaux. La flexibilité indispensable doit être garantie par la présence de fonctions de base dans le traitement de texte qui n’impliquent ni n’excluent aucun questionnement donné. Ceci est démontré par deux exemples d’analyse et de préparation de textes disponibles sous forme électronique.

     

Nutrition,lactation, and birth spacing in filipino women

The Cebu Longitudinal Health and Nutrition Survey is used to examine the roles of women’s nutrition and infant feeding in determining time from birth to menses and time from menses to conception. The analysis sample includes 2,648 Filipino women followed for 24 months postpartum. Recently devised statistical estimation techniques to control for unobserved heterogeneity and endogeneity are employed in estimating a two-state hazard model. Low body mass index and lower dietary fat intake are associated with increased duration of postpartum amenorrhea. Contraceptive use, high dietary fat consumption, higher parity, and absence of spouse predict a longer waiting time to conception once menses have returned. Simulation of the hazard model is used to examine the effects of the key nutrition and lactation factors.     

Disintegration, recognition, and violence: a theoretical perspective

The literature explaining deviance, criminality, or violence offers a broad spectrum of approaches in criminology and sociology. Mostly the theories focus on specific levels of explanation like the macrolevel (for example, strain theories) or the microlevel (for example, self-control theory).This article presents a relatively new theoretical approach combining different levels and focusing on three dimensions associated with specific kinds of recognition: social-structural, institutional, and socioemotional. The social-structural dimension refers to access to the functional systems of society and the accompanying recognition of position, status, and so on. The institutional dimension concentrates on the opportunity to participate in public affairs with the aim of getting moral recognition. The socioemotional dimension emphasizes the quantity and quality of integration in and social support from families, friends, partners, and so on, which provide emotional recognition.The underlying idea is that lack of access, participation, and belonging causes a lack of recognition. When this happens, social and individual problems increase. Thus, deviant and violent behavior can be seen as one potential reaction to a lack of recognition and as a way to gain status and recognition in a different manner (for example, with a delinquent peer group or other gang).     

Emotional reactions to daily workload: The moderating role of attachment orientations

Attachment theory provides compelling theoretical grounds to expect that attachment orientations, i.e. attachment anxiety and avoidance, influence our emotional reactions to job stressors. In spite of that fact, the role of attachment orientations in attenuating or exacerbating emotional reactions to job stressors has been ignored by organisational researchers so far. The main purpose of our diary study, therefore, was to analyse, whether attachment anxiety and avoidance moderate our daily emotional reactions to daily workload. Additional main effects of attachment orientations on daily emotional experiences were also analysed. Multilevel analyses of diary data from 340 participants revealed moderator effects of attachment avoidance. In detail, global and co-worker-specific avoidance interacted with workload in predicting negative emotions. Regarding positive emotions, co-worker-specific avoidance interacted with workload. In addition, global attachment anxiety and avoidance were positively related to negative emotional experiences at work. The negative relationship between co-worker-specific avoidance and positive emotional experiences at work was significant by trend. Taken together, current findings demonstrate attachment orientations’ contribution to our understanding of interindividual differences in daily emotional reactions to daily job stressors, and in daily work-related emotions. In sum, they suggest highly avoidant employees as a risk group in the working population.     

On the role of data,statistics and decisions in a pandemic

AStA Advances in Statistical Analysis - A pandemic poses particular challenges to decision-making because of the need to continuously adapt decisions to rapidly changing evidence and available...     

How Dynamic Capabilities Affect the Effectiveness and Efficiency of Operating Routines under High and Low Levels of Environmental Dynamism

In analysing data on the purchasing routines of 200 small and medium‐sized enterprises (SMEs), this study underscores the overall importance of dynamic capabilities as a way to understand differences in operating‐routine performance. The results suggest that dynamic capabilities have different performance effects in high‐dynamic and low‐dynamic environments. Dynamic capabilities enhance the effectiveness of operating routines under both high and low levels of environmental dynamism. Yet, when analysing the efficiency of operating routines, taking into account the costs of increased effectiveness, dynamic capabilities appear to pay off only under high levels of environmental dynamism.     

Medical laboratory diagnostics and statistics

We review the statistical contributions to the development and production of laboratory diagnostic assays. The tasks and facets of the role of a statistician in diagnostic industry are discussed.