Regime change: gender, class, and the invention of dieting in post-bellum America

"Regime Change" argues against commonly held interpretations that see dieting as a practice established in the 1920s to control women at a time when they gained suffrage and greater economic independence. This article offers an alternative reading, arguing that diet advice literature arrived in the US in the 1860s and originally targeted a male, white, middle-class audience. While the hegemonic beauty ideal for the female body was at its heftiest, men started to build muscle and reduce weight. The ideal of the slender male body was associated with white superiority, social mobility and the national ambition for an American empire. When white middle-class women eventually started dieting in greater numbers in the 1890s, it was because they claimed the same mastery over their bodies as men—and demanded the same privileges as their male peers over immigrants, African Americans and working-class people, who were increasingly imagined as overweight. Revising the history of dieting to show its origins as a masculine practice appropriated by women to stake a claim to class and race privilege invites a rethinking of power and resistance in the disciplining of the female body.     

Effects of drift and noise on the optimal sliding window size for data stream regression models

The analysis of non stationary data streams requires a continuous adaption of the model to the relevant most recent data. This requires that changes in the data stream must be distinguished from noise. Many approaches are based on heuristic adaptation schemes. We analyze simple regression models to understand the joint effects of noise and concept drift and derive the optimal sliding window size for the regression models. Our theoretical analysis and simulations show that a near optimal window size can be crucial. Our models can be used as benchmarks for other models to see how they cope with noise and drift.     

Parental leave benefits and breastfeeding in Germany: effects of the 2007 reform

While breastfeeding is associated with health benefits for both mothers and children, it may also make it difficult for mothers to return to the labor market early. Maternity and parental leave regulations have been developed to mitigate this conflict. In 2007, Germany passed a reform introducing a new parental leave benefit (Elterngeld). In this paper, we address the question of whether the new parental leave benefit impacts breastfeeding initiation and duration in Germany. We use the reform as an exogenous policy variation to obtain causal evidence on breastfeeding behavior, applying a difference-in-differences approach. Mothers in particular benefit from the reform especially if they were employed prior to childbirth or if they have a household income above the income threshold of the previous parental leave scheme (treatment group). The reform did not bring significant changes within the first year of a child’s life for all other mothers (control group). We draw on representative survey data from the Socio-Economic Panel (SOEP) study. Three breastfeeding measures are used for the 2004 to 2009 cohorts: (1) breastfeeding at birth; (2) breastfeeding for at least 4 months; and (3) breastfeeding for at least 6 months. We find no effect of the Elterngeld reform on breastfeeding initiation but do observe an effect on breastfeeding duration. Our results are robust over various sensitivity tests, including placebo regressions, the application of matching approaches, and controlling for regional indicators, among others. Thus, our empirical results provide evidence that the reform’s goal of allowing parents to spend more time with their children during the first year of life also impacted breastfeeding behavior.     

Physical activity assessment and health outcomes in old age: how valid are dose–response relationships in epidemiologic studies?

In this systematic review the validity of the dose–response relationships between physical activity (PA) and energy expenditure (EE) on defined health outcomes (cardio- and cerebrovascular morbidity and mortality, cancer) for the elderly is questioned. Medline, Cochrane, and EMBASE databases were reviewed for epidemiological longitudinal studies in populations aged 60+ for the years 1985–2007. Although most of the 18 identified studies generally demonstrated an inverse dose–response relationship between PA and EE level with morbidity and mortality, the range of dose–responses was remarkably broad. The nature of the dose–response relationship remained unclear. PA questionnaires - even those constructed for the elderly - do not cover the extremely diverse aspects of age-specific PA behavior and modes of muscular activity. Only non-age-specific tables had been used to estimate the EE in the elderly. Direct measurements of EE were limited. The results have implications for the interpretation of the dose–response relationships between PA and EE on defined health outcomes in old age.     

Effects of habitat and landscape quality on amphibian assemblages of urban stormwater ponds

Urbanisation is one of the most severe drivers of current global biodiversity loss and has contributed to severe declines in many amphibian species. The aim of this study was to determine whether artificial stormwater ponds, designed to control water flow, can act as refuges for amphibians in urban areas. Moreover, we analysed the influence of habitat and landscape quality on amphibian species richness of 46 stormwater ponds (STOPON) in comparison to 46 control ponds (CONTROL).Our study revealed that environmental conditions clearly varied between STOPON and CONTROL. The most pronounced differences were that STOPON were larger, shallower, sunnier, more isolated by streets and had a greater cover of built-up area and lower cover of arable land surrounding them. Nevertheless, the amphibian assemblages of STOPON and CONTROL were very similar. All nine amphibian species (including three threatened species) detected in this study were found in both pond types. Moreover, species richness (2.8 ± 0.2 vs. 2.3 ± 0.2) and the frequency of each species did not differ between STOPON and CONTROL. The only exception was Pelophylax spp., which occurred more regularly in STOPON. Both habitat and landscape quality affected amphibian species richness; however, the explanatory power of the habitat models was about twice as high as those of the landscape models.In conclusion, stormwater ponds play an important role for amphibians in urban areas. In comparison to CONTROL, the low landscape quality in the surroundings of STOPON seemed to be compensated by a higher habitat quality due to regular management.     

Prevention of homicidal violence in schools in Germany: the Berlin Leaking Project and the Networks Against School Shootings Project (NETWASS)

Since 1999, Germany has experienced at least twelve serious cases of targeted school violence. This article describes two projects designed to fill the gap between universal prevention and emergency response in preventing severe forms of school violence in Germany. The Berlin Leaking Project examined the viability of preventive efforts based on early identification of leaking behavior that often precedes targeted school attacks. Leaking refers to any behavior or communication that indicates a student is preparing to carry out a violent attack. This would include explicit or implied threats of violence, apparent fascination with prior acts of violence such as Columbine, and any evidence of planning or preparation to carry out an attack. The NETWASS project will test a training program and intervention strategy based on those findings, examining the usefulness of a threat assessment approach to prevent violence by training teachers to recognize leaking behavior by students. This approach is extended by training teachers on a larger scale to identify leaking and then having a school-based team evaluate the student and initiate appropriate interventions, such as mental health services, and in some cases, law enforcement action.     

Physiological Reactivity to Infant Crying and Observed Maternal Sensitivity

Relations between maternal sensitivity and physiological reactivity to infant crying were examined using measures of heart rate (HR) and respiratory sinus arrhythmia (RSA) in 49 mothers of second‐born infants. Using the Ainsworth Sensitivity Scale, an independent assessment of maternal sensitivity was made during maternal free play and bathing of their infants. Physiological reactivity was measured while mothers listened to three blocks of infant cry sounds in a standard cry paradigm. Mothers scoring high on sensitivity were compared to less sensitive mothers on both their physiological reactivity to the presented crying sounds and their physiological mean‐level differences. Significant interaction effects were found for both HR and RSA. Highly sensitive mothers showed a larger increase in HR and stronger RSA withdrawal in response to the first block of cry sounds compared to less sensitive mothers. Main effects showed that highly sensitive mothers had lower mean overall HR, and higher mean RSA levels across all three blocks of crying sounds compared to less sensitive mothers. RSA withdrawal and accompanying HR increases are discussed from a polyvagal perspective as indicative of a better capability in responding to infant signals of negative affect.     

From Dependent to Independent Variable: A Critical Assessment of Operationalisations of ‘Welfare Stateness’ as Macro-Level Indicators in Multilevel Analyses

Social Indicators Research - This paper explores different ways to operationalise properties of the welfare state as explanatory variable in multilevel frameworks. Based on the observation that...