'Spatial Distance' and Preferences for Redistribution in Cities: Localized Risk from the Spatial Externalities of Inequality

Abstract The social and economic forces that shape attitudes toward the welfare state are of central concern to social scientists. Scholarship in this area has paid limited attention to how working part-time, the employment status of nearly 20% of the U.S. workforce, affects redistribution preferences. In this article, we theoretically develop and empirically test an argument about the ways that part-time work, and its relationship to gender, shape redistribution preferences. We articulate two gender-differentiated pathways—one material and one about threats to social status—through which part-time work and gender may jointly shape individuals’ preferences for redistribution. We test our argument using cross-sectional and panel data from the General Social Survey in the United States. We find that the positive relationship between part-time employment, compared to full-time employment, and redistribution preferences is stronger for men than for women. Indeed, we do not detect a relationship between part-time work and redistribution preferences among women. Our results provide support for a gendered relationship between part-time employment and redistribution preferences and demonstrate that both material and status-based mechanisms shape this association.

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Spatial distance between sites of sampling associated with genetic variation among Neospora caninum in aborted bovine foetuses from northern Italy

Parasites & Vectors ◽

10.1186/s13071-020-04557-6 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Luca Villa ◽

Pavlo Maksimov ◽

Christine Luttermann ◽

Mareen Tuschy ◽

Alessia L. Gazzonis ◽

...

Keyword(s):

Genetic Distance ◽

Neospora Caninum ◽

Geographic Distance ◽

Rare Event ◽

Northern Italy ◽

Spatial Distance ◽

Italian Regions ◽

Bovine Abortion

Abstract Background Neospora caninum, a coccidian protozoan, represents an important cause of bovine abortion. Available N. caninum strains show considerable variation in vitro and in vivo, including different virulence in cattle. To which extent sexual recombination, which is possible in the intestines of domestic dogs and closely related carnivores as definitive hosts, contributes to this variation is not clear yet. Methods Aborted bovine foetuses were collected between 2015 and early 2019 from Italian Holstein Friesian dairy herds suffering from reproductive problems. A total of 198 samples were collected from 165 intensive farms located in Lombardy, northern Italy. N. caninum samples were subjected to multilocus-microsatellite genotyping using ten previously established microsatellite markers. In addition to our own data, those from a recent study providing data on five markers from other northern Italian regions were included and analysed. Results Of the 55 samples finally subjected to genotyping, 35 were typed at all or 9 out of 10 loci and their individual multilocus-microsatellite genotype (MLMG) determined. Linear regression revealed a statistically significant association between the spatial distance of the sampling sites with the genetic distance of N. caninum MLMGs (P < 0.001). Including data from this and a previous North Italian study into eBURST analysis revealed that several of N. caninum MLMGs from northern Italy separate into four groups; most of the samples from Lombardy clustered in one of these groups. Principle component analysis revealed similar clusters and confirmed MLMG groups identified by eBURST. Variations observed between MLMGs were not equally distributed over all loci, but predominantly observed in MS7, MS6A, or MS10. Conclusions Our findings confirm the concept of local N. caninum subpopulations. The geographic distance of sampling was associated with the genetic distance as determined by microsatellite typing. Results suggest that multi-parental recombination in N. caninum is a rare event, but does not exclude uniparental mating. More comprehensive studies on microsatellites in N. caninum and related species like Toxoplasma gondii should be undertaken, not only to improve genotyping capabilities, but also to understand possible functions of these regions in the genomes of these parasites.

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Effects of COVID-19 on Urban Population Flow in China

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18041617 ◽

2021 ◽

Vol 18 (4) ◽

pp. 1617 ◽

Cited By ~ 1

Author(s):

Xiaorong Jiang ◽

Wei Wei ◽

Shenglan Wang ◽

Tao Zhang ◽

Chengpeng Lu

Keyword(s):

Network Topology ◽

Traffic Control ◽

Urban Population ◽

Deep Understanding ◽

Clustering Coefficient ◽

Spatial Distance ◽

Structure Evolution ◽

Effective Distance ◽

Urban Hierarchy ◽

The City

The COVID-19 epidemic has become a Public Health Emergency of International Concern. Thus, this sudden health incident has brought great risk and pressure to the city with dense population flow. A deep understanding of the migration characteristics and laws of the urban population in China will play a very positive role in the prevention and control of the epidemic situation. Based on Baidu location-based service (LBS) big data, using complex networks method and geographic visualization tools, this paper explores the spatial structure evolution of population flow network (PFN) in 368 cities of China under different traffic control situations. Effective distance models and linear regression models were established to analyze how the population flow across cities affects the spread of the epidemic. Our findings show that: (1) the scope of population flow is closely related to the administrative level of the city and the traffic control policies in various cities which adjust with the epidemic situation; The PFN mainly presents the hierarchical structure dominated by the urban hierarchy and the regional isolation structure adjacent to the geographical location.(2) through the analysis network topology structure of PFN, it is found that only the first stage has a large clustering coefficient and a relatively short average path length, which conforms to the characteristics of small world network. The epidemic situation has a great impact on the network topology in other stages, and the network structure tends to be centralized. (3) The overall migration scale of the whole country decreased by 36.85% compared with the same period of last year’s lunar calendar, and a further reduction of 78.52% in the nationwide traffic control stage after the festival. (4) Finally, based on the comparison of the effective distance and the spatial distance from the Wuhan to other destination cities, it is demonstrated that there is a higher correlation between the effective distance and the epidemic spread both in Hubei province and the whole country.

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