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.     

Karl-Heinz Hillmann: Überlebensgesellschaft. Von der Endzeitgefahr zur Zukunftssicherung. Mit Beiträgen von Thomas Goppel und Hubert Weinzierl

Ohne Zusammenfassung     

A statistical method to convert published response rates into marginal distributions with an example application in psoriasis

Assessment of severity is essential for the management of chronic diseases. Continuous variables like scores obtained from the Hamilton Rating Scale for Depression or the Psoriasis Area and Severity Index (PASI) are standard measures used in clinical trials of depression and psoriasis. In clinical trials of psoriasis, for example, the reduction of PASI from baseline in response to therapy, in particular the proportion of patients achieving at least 75%, 90%, or 100% improvement of disease (PASI 75, PASI 90, or PASI 100), is typically used to evaluate treatment efficacy. However, evaluation of the proportions of patients reaching absolute PASI values (eg, ≤1, ≤2, ≤3, or ≤5) has recently gained greater clinical interest and is increasingly being reported. When relative versus absolute scores are standard, as is the case with the PASI in psoriasis, it is difficult to compare absolute changes using existing published data. Thus, we developed a method to estimate absolute PASI levels from aggregated relative levels. This conversion method is based on a latent 2‐dimensional normal distribution for the absolute score at baseline and at a specific endpoint with a truncation to allow for baseline inclusion criterion. The model was fitted to aggregated results from simulations and from 3 phase III studies that had known absolute PASI proportions. The predictions represented the actual results quite precisely. This model might be applied to other conditions, such as depression, to estimate proportions of patients achieving an absolute low level of disease activity, given absolute values at baseline and proportions of patients achieving relative improvements at a subsequent time point.     

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).     

Nest design in a changing world: Great tit <Emphasis Type="Italic">Parus major</Emphasis> nests from a Mediterranean city environment as a case study

Investigations of urbanization effects on birds have focused mainly on breeding traits expressed after the nest-building stage (e.g. first-egg date, clutch size, breeding success, and offspring characteristics). Urban studies largely ignored how and why the aspects of nest building might be associated with the degree of urbanization. As urban environments are expected to present novel environmental changes relative to rural environments, it is important to evaluate how nest-building behavior is impacted by vegetation modifications associated with urbanization. To examine nest design in a Mediterranean city environment, we allowed urban great tits (Parus major) to breed in nest boxes in areas that differed in local vegetation cover. We found that different measures of nest size or mass were not associated with vegetation cover. In particular, nests located adjacent to streets with lower vegetation cover were not smaller or lighter than nests in parks with higher vegetation cover. Nests adjacent to streets contained more pine needles than nests in parks. In addition, in nests adjacent to streets, nests from boxes attached to pine trees contained more pine needles than nests from boxes attached to other trees. We suggest that urban-related alterations in vegetation cover do not directly impose physical limits on nest size in species that are opportunistic in the selection of nesting material. However, nest composition as reflected in the use of pine needles was clearly affected by habitat type and the planted tree species present, which implies that rapid habitat change impacts nest composition. We do not exclude that urbanization might impact other aspects of nest building behaviour not covered in our study (e.g. costs of searching for nest material), and that the strengths of the associations between urbanization and nest structures might differ among study populations or species.     

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.     

The effects of a change in the point system on immigration: evidence from the 2001 Quebec reform

In 2001, Quebec changed its point system, a system that selects immigrants based on specific observable characteristics. The explicit objective was to increase the number of French-speaking immigrants, with no deterioration in overall labor market performance. To achieve this, points for French and education (specifically bachelor’s degrees) were increased. In parallel, points for a subjective assessment of “adaptability” were decreased. In line with the initial objective, we find more French-speaking immigrants with bachelor’s degrees, and no worsening in labor market outcomes after the reform. These results hold in a difference-in-differences and triple differences analysis. This paper shows how point systems can be used to shape the immigrant workforce according to policy goals.