A family of methods for statistical disclosure control

Statistical disclosure control (SDC) is a balancing act between mandatory data protection and the comprehensible demand from researchers for access to original data. In this paper, a family of methods is defined to ‘mask’ sensitive variables before data files can be released. In the first step, the variable to be masked is ‘cloned’ (C). Then, the duplicated variable as a whole or just a part of it is ‘suppressed’ (S). The masking procedure's third step ‘imputes’ (I) data for these artificial missings. Then, the original variable can be deleted and its masked substitute has to serve as the basis for the analysis of data. The idea of this general ‘CSI framework’ is to open the wide field of imputation methods for SDC. The method applied in the I-step can make use of available auxiliary variables including the original variable. Different members of this family of methods delivering variance estimators are discussed in some detail. Furthermore, a simulation study analyzes various methods belonging to the family with respect to both, the quality of parameter estimation and privacy protection. Based on the results obtained, recommendations are formulated for different estimation tasks.     

The front end in non-assembled product development: A multiple case study of mineral- and metal firms

We conceptualize the front end in non-assembled product development to be iterative and experiment-based, consisting of three sub-phases: informal start-up, formal idea-study, and formal pre-study. Although some key activities are shared with the front end activities in assembled product development, literature reviews, anticipating requirements of customers’ production processes, analysis of raw materials, anticipation of scale-up problems, and tests in bench-, pilot plant-, and full scale production represent unique activities. In addition, product concepts were frequently developed in parallel, requiring specification of physical, chemical and structural properties. These findings have implications for increasing the success and quality of front end efforts.     

Variability and Uncertainty in Swedish Exposure Factors for Use in Quantitative Exposure Assessments

Information of exposure factors used in quantitative risk assessments has previously been compiled and reported for U.S. and European populations. However, due to the advancement of science and knowledge, these reports are in continuous need of updating with new data. Equally important is the change over time of many exposure factors related to both physiological characteristics and human behavior. Body weight, skin surface, time use, and dietary habits are some of the most obvious examples covered here. A wealth of data is available from literature not primarily gathered for the purpose of risk assessment. Here we review a number of key exposure factors and compare these factors between northern Europe—here represented by Sweden—and the United States. Many previous compilations of exposure factor data focus on interindividual variability and variability between sexes and age groups, while uncertainty is mainly dealt with in a qualitative way. In this article variability is assessed along with uncertainty. As estimates of central tendency and interindividual variability, mean, standard deviation, skewness, kurtosis, and multiple percentiles were calculated, while uncertainty was characterized using 95% confidence intervals for these parameters. The presented statistics are appropriate for use in deterministic analyses using point estimates for each input parameter as well as in probabilistic assessments.     

Deadline for Parenthood: Fertility Postponement and Age Norms in Poland

The postponement of childbearing is occurring across Europe, but the paths of this trend differ profoundly from country to country. In Poland, as in other Central and Eastern European countries, most women have their first child at a relatively young age. This article asks about the role of age norms in sustaining the pattern of early motherhood. We investigate young adults’ perceptions of age in relation to their fertility choices. We find that age is, indeed, a salient dimension that structures and regulates individual childbearing plans. The qualitative approach of our study allows for gaining insights into how age norms are explained, argued about and sanctioned. Finally, we reconstruct the mechanisms of the normative influence of age limits (deadlines) on fertility behaviour, improving our understanding of the timing of childbearing.     

Adaptive Test for Testing the Difference in Survival Distributions

An adaptive test is proposed for the problem of testing the difference in survival distributions when the shape of the hazard ratio is unknown, hence the efficient test is unknown. The proposed adaptive test selects a test statistic from a finite set of the weighted logrank statistics T on the basis of the estimates of the efficiencies of the tests in T for given data. The efficiency estimator uses the length of the test based nonparametric confidence interval for the shift in a time transformed shift model. The suggested adaptive test is shown to be asymptotically efficient among the tests in T under the time transformed shift model and conditions commonly used in survival analysis. Simulations demonstrate that the adaptive test enjoys good small sample properties and in most situations is more powerful than the test using the maximum of the tests in T.     

Standpoint theory and middle-range theorizing in International Sociology

This paper responds to Julian Go's Lecture “Thinking against Empire. Anti-colonial Thought and Social Theory.” It proceeds in two parts: I first follow Go's invitation to read and reread Mabel Dove Danquah and Frantz Fanon and explore what their work contributes to our understanding of state-forms. I then examine the terms of Go's invitation more closely. I contrast Go's juxtaposition of imperial sociology on the one hand and anti-colonial sociology on the other hand, with the broader range of theoretical traditions and methods, which a practice-oriented sociology of sociology and an international history of sociology would highlight. I raise the question what “standpoint” adds to the authors Go discusses and the broader range of scholars who have engaged with post-colonial contexts in their research at this point in time. Calling for consideration of the anti-colonial standpoint is a particular choice, which has a distinctive heritage in Hegelian-Marxian projections of the social whole and is in tension with either deep exploration of particular thinkers or the middle-range theorizing that Go also seems to endorse. Defined at a level of abstraction that is “above” (or underneath) actual conversations in a range of fields and subfields, it can appear as a “test” for scholars who have long engaged with post-colonial contexts, which can have unintended consequences when coupled with the institutional power and asymmetric insularity of Anglo-American academia.     

The ‘compliant’, the ‘pacified’ and the ‘rebel’: experiences with Swiss disability insurance

Switzerland’s social policies in the field of disability have been significantly reshaped over the last two decades by reducing the number of allowances awarded and by increasing the recourse to vocational rehabilitation measures. What stances do individuals who experience the implementation of these policies adopt? What kind of tests are they subjected to? How can we explain the posture they adopt – be it ‘compliant’, ‘pacified’ or ‘rebellious’ – when facing the (re)assignations of their identity and professional status? Drawing on interviews conducted with individuals who have recently been involved in programmes set up by Swiss disability insurance, we highlight their uncertainties and concerns relating to their place in society, as well as their reactions to disability insurance’s interventions.     

City parks vs. natural areas - is it possible to preserve a natural level of bee richness and abundance in a city park?

Urbanisation is an expansive process and a majority of insects live in human-modified areas. At the same time, a decrease in pollinator species richness and abundance has recently been observed in Europe, which in turn may have serious ecological and economic consequences. This study investigates the abundance, species richness and functional traits of wild bees in urban city parks in comparison to natural areas. The aim of this research was to assess the potential conservation values of urban green areas for bees. The present study demonstrates that a large and diversified city park may be a favourable habitat for bees, comparable to the natural fauna both in terms of the number and abundance of bee species. However, the study also showed that there were differences in the occurrence of species with different functional traits in the city parks investigated and in the natural landscape.