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We show the existence of additive kinematic formulas for general flag area measures, which generalizes a recent result by Wannerer. Building on previous work by the second named author, we introduce an algebraic framework to compute these formulas explicitly. This is carried out in detail in the case of the incomplete flag manifold consisting of all (p+1)-planes containing a unit vector.
This study simulates three income tax scenarios in a Mirrleesian setting for 24 EU countries using data from the 2014 Structure of Earnings Survey. In scenario 1, each country individually maximizes its own welfare (benchmark). In scenarios 2 and 3, total welfare in the EU is maximized over a common budget constraint. Unlike scenario 2, the social planner of scenario 3 differentiates taxes by country of residence. If a common tax and transfer system were implemented in the EU, countries with a relatively higher mean wage rate—particularly those in Western and some of the Northern European countries—would transfer resources to the others. Scenario 2 implies increased labor distortions for almost all countries and, hence, leads to a contraction in total output. Scenario 3 produces higher (lower) marginal taxes for high- (low-) mean countries compared to the benchmark. The change in total output depends on the income effects on labor supply. Overall, total welfare is higher for the scenarios involving a European tax and transfer system despite more than two thirds of all the agents becoming worse off relative to the benchmark. A politically more feasible integrated tax system improves the well-being of almost half of all the EU but considerably reduces the aggregate welfare benefits.
The genus Afronurus has several very common mayfly species in China and they are widely distributed in this country. Some of them are quite similar to each other in both imaginal and nymphal stages. However, these species have not been systematically compared and reviewed so far. In this study, six species are recognized. All nymphs of them share the following characters: gills V–VI with additional arrow-like accessory lobes, branched dentisetae, two rows of bristles and setae on hindtibiae and spotted abdominal terga. The males have divergent penes and clearly expressed titillators. The nymphs of the new species A. drepanophyllus sp. nov. have sickle-like gills I, spotted and striped body color, and males have unique genitalia. The nymphal stages of A. furcatus and A. hunanensis, which are associated and described for the first time, have similar body color to A. drepanophyllus sp. nov., but their pale dots on the head capsules and the shape of the hypopharynx are different. Keys to males and nymphs of the six species are provided.
Two new species of the genus Eponisiella Emeljanov, 1984 are described and illustrated from China (Guizhou and Shandong Provinces). These are E. dafangensis sp. nov. and E. shandongensis sp. nov., giving the genus eight species in total. A key to the species of Eponisiella is provided as well as a map of their geographic distribution, which is briefly discussed.
Thai limestone karsts are known to contain a rich biodiversity of animals, especially terrestrial snails, but still require further intensive exploration to evaluate their biodiversity. To date, only a few studies on the limestone karst-inhabiting land snail genera have been published. The present work focuses on the species diversity and phylogenetic relationships of the limestone karst-restricted land snail genus Aenigmatoconcha from Thailand, based on comparative morphology and molecular evidence. The results yielded three known species (A. clivicola Tumpeesuwan & Tumpeesuwan, 2017, A. sumonthai Tumpeesuwan & Tumpeesuwan, 2018, and A. mitis (Pfeiffer, 1863) comb. nov.), plus a new species (A. eunetis Pholyotha & Panha sp. nov). The phylogenetic analyses of partial fragments of the mitochondrial cytochrome oxidase c subunit I (COI) gene confirmed the monophyly of all recognized species and congruence with the traditional morphology-based species designations. Average uncorrected p-distances of COI sequences between species were 9.7–12.0% and within species were 0.2–4.2%. This study also provides the re-description of penial sculpture, penial sheath, flagellum, penial caecum, and mantle lobe morphology that were neglected from the type species description. The present discovery of a new species increases the known diversity of Thai land snails and will support the conservation planning to protect karst biodiversity.
Drawing on ethnographic research conducted in the office and warehouse of an organic wholesaler in Germany, this article presents a trans-sequential analysis of an innovation that aimed to reduce the use of plastic wrap. During the analytical reconstruction of the innovation process, the substitution of plastic wrap turned out to be a precarious process of negotiating attachments to plastic. Against this background, innovation is not simply about the implementation and substitution of technology by human actors, but about negotiating attachments that humans have towards objects within socio-technical assemblages. Drawing on actor-network theory and the sociology of attachment, the article highlights the dynamic interplay between persistence and problematization of plastic wrap, which characterizes the innovation process. This interplay is seen along several steps during the innovation process: from (1) the problematization of plastic dependency to (2) the mobilization of alternatives, to (3) resistance against measures to be implemented and (4) the enforcement of reusable strings as technological substitution and (5) to conclusive retrospection on the innovation process. The trans-sequential analysis shows that ‘getting rid of something’ might be an imperfect approach to dealing with unsustainable object relations. Instead, withdrawing is a double-sided process of detaching and attaching, removing constraints and building new ones.
The social identity approach to stress proposes that the beneficial effects of social identification develop through individual and group processes, but few studies have addressed both levels simultaneously. Using a multilevel person–environment fit framework, we investigate the group-level relationship between team identification (TI) and exhaustion, the individual-level relationship for people within a group, and the cross-level moderation effect to test whether individual-level exhaustion depends on the level of (in)congruence in TI between individuals and their group as a whole. We test our hypotheses in a sample of 525 employees from 82 teams. Multilevel polynomial regression analysis revealed a negative linear relationship between individual-level identification and exhaustion. Surprisingly, the relation between group-level identification and exhaustion was curvilinear, indicating that group-level identification was more beneficial at low and high levels compared with medium levels. As predicted, the cross-level moderation of the individual-level relationship by group-level identification was also significant, showing that as individuals became more incongruent in a positive direction (i.e., they identified more strongly than the average team member), they reported less exhaustion, but only if the group-level identification was average or high. These results emphasize the benefits of analyzing TI in a multilevel framework, with both theoretical and practical implications.
Research has suggested that teachers’ beliefs toward culturally diverse classrooms are affected during teacher education. Text reading, as one of the major learning activities in initial teacher education, is supposed to affect teachers’ educational concepts and beliefs. We conducted two experiments to test the impact of reading a positively or negatively oriented persuasive text about diversity on preservice teachers’ belief change. In Study 1 (N = 42), we found that belief change varied significantly as a function of the direction of the text condition, and that the reading of the texts led to a significantly stronger belief change if the text was in alignment with participants’ prior beliefs. Study 2 (N = 57) revealed a middle-sized but non-significant moderator effect for prior knowledge (p = .08, η2p = .06), suggesting that participants with more prior knowledge were less likely to be persuaded by the text. The results provide new insights into factors that may affect the development of preservice teachers’ diversity beliefs.
Most political systems consist of multiple layers. While this fact is widely acknowledged, we know surprisingly little about its implications for policy-making. Most comparative studies still focus exclusively on the national level. We posit that both “methodological nationalism” and “methodological subnationalism” should be avoided. We argue instead that in multilevel systems national and subnational governments jointly affect policy-making. Their respective influence is, however, conditional on the distribution of policy authority. Moreover, we identify power asymmetries, as subnational governments hardly affect policy-making in centralized systems whereas national governments shape subnational policy-making even in decentralized polities. Empirically, we study the case of education policy. Novel data on regional education spending, regional and national governments’ ideology, and regional authority over education in 282 regions in 15 countries over 21 years reveals strong support for the interplay between ideology and the distribution of authority across levels. We conclude by sketching a resulting research agenda.