Social welfare in the light of topic modelling

With an increased focus on social well-being in response to a burgeoning global economy exposing the weaknesses of social welfare policies, research output in the field has grown exponentially. Keeping track of the evolving research themes proves difficult due to the steady rise in the number of studies published in the interdisciplinary field of social welfare. Therefore, researchers need a comprehensive overview to confirm the current shape of the field based on the published research. Using a latent Dirichlet allocation algorithm as a topic modelling technique, this study identified 12 prominent themes from more than 10,000 research outputs on social welfare published from 2000 to 2020 in Scopus-indexed journals. Such an exploratory text-mining approach to literature review provides broad insights into the diversity of research and may serve as a foundation for further in-depth studies. Identifying these 12 thematic areas and their sub-themes allows us to articulate the complexity and diversity of social welfare issues, which go far beyond the field of well-established welfare economics or social work. The study shows that the topic of ‘social welfare’ has not only evolved over time but has significantly broadened its meaning. It can no longer be solely synonymous with institutional social security. We contend that research in this area needs to take into account a broader and more systematic range of determinants constituting the dynamic character of social welfare.     

Absolutely Continuous Copulas with Given Diagonal Sections

Necessary and sufficient conditions are given in order to ensure that a function δ:[0, 1] → [0, 1] is the diagonal section of an absolutely continuous copula. Explicit constructions are provided.     

The Politics of Seasonal Labour Migration in Switzerland,France and Spain

This article analyses the effects of the politics of seasonal foreign worker admissions on migrant legality in the context of the post‐1945 and the post‐1990 seasonal foreign worker policy in Switzerland, France and Spain respectively. It seeks historical evidence attesting to the ability of seasonal admissions to restrict workers to their non‐resident status. It presents implications for circular migration, the dernier cri in European migration policy aimed to strike a compromise between a perceived post‐crisis demand for the admission of foreign workers and the reluctance to make them prospective citizens.

Policy Implications

• Migration policy stakeholders have shaped foreign worker admissions according to their interests.
• Under some conditions, low‐skilled seasonal foreign worker admissions have contributed to irregular migration, either through workers' overstays or through parallel irregular entries
• There are both differences and similarities between the seasonal admissions advocated under the post‐2007 circular migration schemes, and those of the 1950s–1960s, as well as those of 1990s to early 2000s. The similarities could, under some conditions, trigger the repetition of some of the unexpected outcomes revealed by historical seasonal foreign worker admissions under the post 2007 schemes.

     

From words to deeds: Health service reform in Poland

After two years of fundamental political changes in Poland a lot of enthusiasm has faded. The country is on its way towards a market economy but the process of transformation is proving more difficult than expected. The social sector in particular is being hampered. Budgetary cuts undermine any feeling of security. Society seems to be entirely unprepared to accept changes that lead to a reduction of social packages offered by former regimes. Hopes associated with 5the outcome of health care reform were aroused by the length of time taken to conceptualize the main proposals. The process started as early as 1980 and was supposed steadily to yield easier access and higher technology. When it became clear that this was unrealistic because of general economic crises, the pace of health service reform was slowed down. It was a painful process to abandon illusion. Now it is becoming accepted that the reform is to improve the elementary effectiveness and efficiency of health services. Thanks to this breakthrough it has been possible to make and put into practice two major decisions: the regional integration of health services, and the new law on health care institutions.     

Approximation Algorithms for Bounded Facility Location Problems

The bounded k-median problem is to select in an undirected graph G = (V,E) a set S of k vertices such that the distance from any vertex v V to S is at most a given bound d and the average distance from vertices V\S to S is minimized. We present randomized algorithms for several versions of this problem and we prove some inapproximability results. We also study the bounded version of the uncapacitated facility location problem and present extensions of known deterministic algorithms for the unbounded version.     

Be Careful Where You Smile: Culture Shapes Judgments of Intelligence and Honesty of Smiling Individuals

Smiling individuals are usually perceived more favorably than non-smiling ones—they are judged as happier, more attractive, competent, and friendly. These seemingly clear and obvious consequences of smiling are assumed to be culturally universal, however most of the psychological research is carried out in WEIRD societies (Western, Educated, Industrialized, Rich, and Democratic) and the influence of culture on social perception of nonverbal behavior is still understudied. Here we show that a smiling individual may be judged as less intelligent than the same non-smiling individual in cultures low on the GLOBE’s uncertainty avoidance dimension. Furthermore, we show that corruption at the societal level may undermine the prosocial perception of smiling—in societies with high corruption indicators, trust toward smiling individuals is reduced. This research fosters understanding of the cultural framework surrounding nonverbal communication processes and reveals that in some cultures smiling may lead to negative attributions.     

Application of diffusion maps to identify human factors of self-reported anomalies in aviation

A study investigating what factors are present leading to pilots submitting voluntary anomaly reports regarding their flight performance was conducted. Diffusion Maps (DM) were selected as the method of choice for performing dimensionality reduction on text records for this study. Diffusion Maps have seen successful use in other domains such as image classification and pattern recognition. High-dimensionality data in the form of narrative text reports from the NASA Aviation Safety Reporting System (ASRS) were clustered and categorized by way of dimensionality reduction. Supervised analyses were performed to create a baseline document clustering system. Dimensionality reduction techniques identified concepts or keywords within records, and allowed the creation of a framework for an unsupervised document classification system. Results from the unsupervised clustering algorithm performed similarly to the supervised methods outlined in the study. The dimensionality reduction was performed on 100 of the most commonly occurring words within 126,000 text records describing commercial aviation incidents. This study demonstrates that unsupervised machine clustering and organization of incident reports is possible based on unbiased inputs. Findings from this study reinforced traditional views on what factors contribute to civil aviation anomalies, however, new associations between previously unrelated factors and conditions were also found.     

Does NGOs’ Commercialization Affect Volunteer Work? The Crowding out or Crowding in Effect

Public Organization Review - The aim of this article is to identify whether the commercialization of NGOs has an influence on the crowding out or crowding in effect of volunteer work, and to...     

Wavelet semi-parametric inference for long memory in volatility in the presence of a trend

Risk of investing in a financial asset is quantified by functionals of squared returns. Discrete time stochastic volatility (SV) models impose a convenient and practically relevant time series dependence structure on the log-squared returns. Different long-term risk characteristics are postulated by short-memory SV and long-memory SV models. It is therefore important to test which of these two alternatives is suitable for a specific asset. Most standard tests are confounded by deterministic trends. This paper introduces a new, wavelet-based, test of the null hypothesis of short versus long memory in volatility which is robust to deterministic trends. In finite samples, the test performs better than currently available tests which are based on the Fourier transform.