Population Space and Place最新文献

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Industrial Structure Rationalisation, Upgrading, and the Geography of Intercity Migration in China 产业结构合理化、升级与中国城际人口迁移地理学
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-10-03 DOI: 10.1002/psp.70113
Sen Li, Jianfa Shen, Hengyu Gu
{"title":"Industrial Structure Rationalisation, Upgrading, and the Geography of Intercity Migration in China","authors":"Sen Li,&nbsp;Jianfa Shen,&nbsp;Hengyu Gu","doi":"10.1002/psp.70113","DOIUrl":"https://doi.org/10.1002/psp.70113","url":null,"abstract":"<p>This study investigates the changing geographies of intercity migration in China and how various aspects of cities' industrial structure shape these patterns. Using microdata from the population census and the 1% population sampling survey, the analysis identifies a rising share of intra-provincial migration from 2000 to 2015, accompanied by more notable changes in its spatial pattern compared to interprovincial migration. A shift in migratory routes is emerging, from interprovincial migration to developed eastern cities toward intra-provincial migration to provincial capitals. A gravity model with Poisson pseudo-maximum likelihood estimation is employed to assess the impact of cities' industrial structure—measured by industrial structure rationalisation, inter-sectoral upgrading, and intra-sectoral manufacturing upgrading—on intercity migration. The econometric results indicate that higher levels of industrial structure rationalisation and nonagricultural industrial development are associated with greater in-migration and lower out-migration. A higher capital-intensive manufacturing concentration tends to reduce population inflows, whereas cities with a higher concentration of technology-intensive manufacturing attract more migrants. The subsample heterogeneity analysis (i.e., migration to eastern vs. non-eastern cities, and to high- vs. low-hierarchy cities) and the moderating effects of time, whether or not crossing provincial boundaries, and economy are discussed. Our findings provide insights for policymaking in addressing the dual challenges of sustaining population inflows while undertaking industrial restructuring.</p>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/psp.70113","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Broken Desire: Chinese Students’ Abandonment of Overseas Study Amidst the Changing Global Landscape and Geopolitical Tensions 破碎的愿望:在全球格局变化和地缘政治紧张局势下中国学生放弃海外留学
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-10-03 DOI: 10.1002/psp.70109
Jiexiu Chen, Yuqiong Fang, Wenqin Shen
{"title":"Broken Desire: Chinese Students’ Abandonment of Overseas Study Amidst the Changing Global Landscape and Geopolitical Tensions","authors":"Jiexiu Chen,&nbsp;Yuqiong Fang,&nbsp;Wenqin Shen","doi":"10.1002/psp.70109","DOIUrl":"https://doi.org/10.1002/psp.70109","url":null,"abstract":"<div>\u0000 \u0000 <p>As the broad field of international education experienced unforeseeable changes with the rising of geopolitical tensions amplified by the pandemic, the long-standing interest in studying abroad among Chinese students at top research universities has experienced a misalignment with the changing landscape and the new normality created by the global crisis. Drawing upon the intricate experiences and perceptions of 31 students from Chinese top research universities who have opted out of pursuing studies abroad due to the impact of pandemic and other global geopolitical tensions, this article investigates how the changing global landscape has shaken participants’ desire for mobility. Such desire has long been argued as a collective imagination of global higher education (Collins 2013). Our findings demonstrate how participants recalibrated their strategies in international political tensions and economic recessions at the macro level, with alterations in mobility infrastructure at the meso level. At the micro level, we find that many participants tended to reassess the symbolic value of international study and shift to a ‘calculative self’ which emphasises a more one-dimensional consideration of the economic return on their study abroad decisions. We consider that amid lasting turbulence in the global landscape, discussions centred on ISM have shifted from mobility to immobility, and the previously shared global imaginings of international education have undergone notable transformation.</p>\u0000 </div>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Employment Landscape of Older Migrant Workers in China's Aging Society: The Role of City-Level and Industry Specialization 中国老龄化社会中老年农民工的就业格局:城市层面和行业专业化的作用
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-10-01 DOI: 10.1002/psp.70110
Haobin Fan, Ting Zhang
{"title":"The Employment Landscape of Older Migrant Workers in China's Aging Society: The Role of City-Level and Industry Specialization","authors":"Haobin Fan,&nbsp;Ting Zhang","doi":"10.1002/psp.70110","DOIUrl":"https://doi.org/10.1002/psp.70110","url":null,"abstract":"<div>\u0000 \u0000 <p>As China's population ages, a rising number of older migrants continue to seek urban employment. This study examines how city-level development and industry specialization shape their employment prospects. Using individual- and city-level data from 2015 to 2017, we find that older migrant workers are more likely to secure jobs in lower-tier cities than in top-tier metropolises like Beijing or Shanghai. This pattern is driven by industry specialization, especially in construction, which creates dense local labour markets and offers wage premiums. These conditions align with older migrants' characteristics: lower education, limited pension coverage, and a stronger preference for wages over housing quality. Our findings provide new insights into aging, labour migration, and urban labour market structure in China.</p>\u0000 </div>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Co-Ethnic Networks in Ethnic Minority's Migration Destination Choices 少数民族移民目的地选择中的共族网络
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-30 DOI: 10.1002/psp.70114
Xinhong Fu, Wanru Xiong
{"title":"Co-Ethnic Networks in Ethnic Minority's Migration Destination Choices","authors":"Xinhong Fu,&nbsp;Wanru Xiong","doi":"10.1002/psp.70114","DOIUrl":"https://doi.org/10.1002/psp.70114","url":null,"abstract":"<div>\u0000 \u0000 <p>Co-ethnic networks influence people's migration destination choices, particularly for vulnerable populations and ethnic minorities. While the influence of co-ethnic networks has been well-documented in the context of international migration, its impact on internal migrants in multi-ethnic countries remains underexplored. Moreover, previous research has failed to disentangle the impacts of co-ethnic networks and native-place networks on migrants' destination choices in the context of internal labour migration due to data limitations. This study takes advantage of a full sample of 53,733 ethnic-minority labour migrants from X County in China to examine how co-ethnic networks impact ethnic minority's migration destination choice, and how these impacts vary with migrants' labour mobility. Our findings reveal two key insights: First, migrants are more likely to choose destinations with a large co-ethnic network compared to migrants from the same region but with different ethnic backgrounds. Second, migrants with disadvantaged attributes, who typically exhibit lower labour mobility, tend to show a stronger preference for destinations with large co-ethnic communities. This study quantifies the influence of co-ethnic networks on internal labour migration destination choices and explores their interactions with migrants' labour mobility.</p>\u0000 </div>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From Masculinisation to Feminisation of Metropolitan Areas: The Changing Impact of Internal Migration on Regional Sex Ratios in Japan 都市圈从男性化到女性化:日本内部移民对地区性别比的变化影响
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-30 DOI: 10.1002/psp.70108
Masaki Kotsubo, Tomoki Nakaya
{"title":"From Masculinisation to Feminisation of Metropolitan Areas: The Changing Impact of Internal Migration on Regional Sex Ratios in Japan","authors":"Masaki Kotsubo,&nbsp;Tomoki Nakaya","doi":"10.1002/psp.70108","DOIUrl":"https://doi.org/10.1002/psp.70108","url":null,"abstract":"<p>In Western countries, more women live in urban or high-population-density areas than men, reflecting selective rural-to-urban migration by sex. In contrast, the sex ratio of the Tokyo metropolitan area, which includes the capital in Japan, is relatively high compared to other areas within the country, suggesting male-dominant migration towards that area. However, there were contradictory patterns of recent migration, such as selective migration of women to metropolitan areas and a larger net in-migration of women to metropolitan areas than men. This can be interpreted to mean that the role of internal migration changed from increasing the sex ratio of metropolitan areas through ‘masculinisation’ to decreasing it through ‘feminisation.’ This study investigates the changes in migration patterns and their impact on the regional sex ratio in Japan using macro-level data. It first shows the distinctive feature of high sex ratios of inter-prefectural migrants and migration rates from 1958 to the present. The sex ratio increased until approximately 1990 and decreased thereafter. Subsequently, gender differences in education and employment were summarised as factors related to migration patterns by sex. These differences have gradually become smaller. Finally, this study quantifies the impact of inter-prefectural migration on prefectural sex ratios using four decennial censuses from 1990 to 2020. The results indicated that the impact of migration changed from ‘masculinisation’ to ‘feminisation’ of the Tokyo metropolitan area and vice versa in the case of nonmetropolitan areas in about 2010. This suggests that the migration patterns in Japan have gradually resembled those of Western countries over the past three decades.</p>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/psp.70108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Freedom and Cradle: The Impact of Flexible Work on Chinese Women's Fertility Intention 自由与摇篮:弹性工作对中国妇女生育意愿的影响
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-30 DOI: 10.1002/psp.70111
Zhihua Wang, Zengzeng Fan
{"title":"Freedom and Cradle: The Impact of Flexible Work on Chinese Women's Fertility Intention","authors":"Zhihua Wang,&nbsp;Zengzeng Fan","doi":"10.1002/psp.70111","DOIUrl":"https://doi.org/10.1002/psp.70111","url":null,"abstract":"<div>\u0000 \u0000 <p>The phenomenon of low fertility rate in China is closely related to the work-family conflict faced by women. In recent years, flexible work has gradually been regarded as an important measure to balance women's work-family relationships and solve the current situation of low fertility rates. Employing China Labor-force Dynamic Survey (CLDS) data from 2014 to 2018, this study utilizes the instrumental variable to test the relationship between flexible work and fertility intention empirically. We find that the higher the flexible work hours, the stronger the fertility intention of women of childbearing age. After excluding the influence of fertility policies, addressing endogeneity issues, and conducting robustness tests in different ways, this conclusion is still supported. Mechanism analysis indicates that flexible work is beneficial in alleviating women's work-family conflicts, improving individual job satisfaction and life happiness, and thereby promoting an increase in fertility willingness. Heterogeneity analysis reveals that the impact of flexible work on fertility intention mainly affects groups engaged in the tertiary industry, state-owned enterprises, full-time employment, middle- and high-income earners, married, and those with fertility experience. Further analysis reveals that the family's flexible work hours are beneficial in increasing women's willingness to have children, and flexible work also has a positive impact on actual fertility behavior.</p>\u0000 </div>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Health Decline and Residential Transitions Among Older Adults in Europe 欧洲老年人的健康下降和居住转变
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-29 DOI: 10.1002/psp.70116
Sanny D. Afable, Yana Vierboom, Megan Evans, Júlia Mikolai, Hill Kulu, Mikko Myrskylä
{"title":"Health Decline and Residential Transitions Among Older Adults in Europe","authors":"Sanny D. Afable,&nbsp;Yana Vierboom,&nbsp;Megan Evans,&nbsp;Júlia Mikolai,&nbsp;Hill Kulu,&nbsp;Mikko Myrskylä","doi":"10.1002/psp.70116","DOIUrl":"10.1002/psp.70116","url":null,"abstract":"<p>Residential mobility is a possible strategy to cope with health challenges in later life. However, little research has examined whether and how health decline triggers residential mobility and whether this relationship differs between parents and childless individuals. Using data on parents and non-parents aged 50+ from the Survey of Health, Ageing and Retirement in Europe (SHARE), we perform multinomial logistic regression to examine how recent and previous health events (defined as a decline in acute health, functional limitation, frailty and self-rated health) influence the 2-year probability of transitions between care arrangements. We find that recent and previous health declines are not triggering moves towards intergenerational co-residence, but acute health events, functional limitation and worsened frailty are associated with transitions to home-based care for parents and non-parents alike. Additionally, previous health declines have a stronger influence on most residential transitions compared to recent health declines across parental status, suggesting that it takes time for health decline to induce residential mobility. Our findings demonstrate the importance of viewing late-life residential mobility from a relational framework and highlight home-based care as a key strategy for responding to health challenges in later life.</p>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/psp.70116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Does Later Longer Fewer Campaign Promote Intergenerational Mobility in China? 晚育运动促进了中国的代际流动吗?
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-28 DOI: 10.1002/psp.70112
Chong Zhuo, Guixin Wang
{"title":"Does Later Longer Fewer Campaign Promote Intergenerational Mobility in China?","authors":"Chong Zhuo,&nbsp;Guixin Wang","doi":"10.1002/psp.70112","DOIUrl":"https://doi.org/10.1002/psp.70112","url":null,"abstract":"<div>\u0000 \u0000 <p>In the 1970s China implemented Later Longer Fewer Campaign (LLFC), it's earliest and most widespread family planning policy. This paper systematically examines LLFC's impact on intergenerational mobility using cohort difference-in-differences (DID) and event study. The analysis draws on data from 342 local gazetteers, the 2011–2015 China Health and Retirement Longitudinal Study (CHARLS), and the 2015 National 1% Population Sample Survey. Following the LLFC's implementation, the average number of years of education among the next generation in affected areas increased by 5.08%, and the likelihood of children from primary-educated families completing tertiary education increased by 4.28%. In addition to improved education outcomes, the LLFC led to higher annual incomes and a significantly greater probability of individuals becoming technicians and managers. Two main mechanisms explain the LLFC's effect on intergenerational mobility: upbringing awareness transition and increased returns on human capital, with the former playing a more prominent role. The success of incentive-based family planning policies demonstrates that such approaches can generate substantial upward intergenerational mobility spillover effects.</p>\u0000 </div>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Educational Spaces and Student Mobility: Transiting the Peripheries of the Barcelona Metropolitan Area 教育空间和学生流动:巴塞罗那大都会区的外围
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-25 DOI: 10.1002/psp.70107
Andreu Termes, Joan Checa
{"title":"Educational Spaces and Student Mobility: Transiting the Peripheries of the Barcelona Metropolitan Area","authors":"Andreu Termes,&nbsp;Joan Checa","doi":"10.1002/psp.70107","DOIUrl":"https://doi.org/10.1002/psp.70107","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents a quantitative case study of student mobility in post-compulsory secondary education—including both academic and vocational tracks—within the Barcelona Metropolitan Area (BMA) between 2019 and 2022. The study investigates the relationship between the territorial distribution of school places, student home-to-school mobility, and the configuration of educational spaces. The theoretical framework combines two main approaches: critical geography and structuralism, drawing respectively on the works of Doreen Massey and Pierre Bourdieu. Using quantitative techniques and a comprehensive census database of over 200,000 students, our findings suggest that educational spaces in the BMA are articulated around three key variables: school provision (public, private), educational tracks (academic, vocational), and educational spaces (central Barcelona, elite suburbs, working-class enclaves). Our analysis—employing, among other techniques, Cramér's V to assess the strength of associations between variables—underscores the socially embedded nature of mobility, which is deeply intertwined with forms of economic and cultural capital. This is reflected in the stark contrast between the mobility patterns of middle- and upper-class students—who display high levels of mobility, particularly through centralisation towards Barcelona and suburban trajectories—and those of working-class students, whose mobility is more limited and primarily confined to inter-peripheral movements. The paper concludes with a discussion of the theoretical and political implications of these findings, particularly in relation to territorial justice and educational equity—considering, for example, the effects of school choice policies and neighbourhood-based inequalities. We argue that these insights may be applicable to other Southern European metropolitan contexts with comparable educational systems.</p></div>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145146535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spatial Variation in the Educational Gradient of First Motherhood in Spain: Occurrence and Timing 西班牙第一母亲教育梯度的空间变异:发生与时间
IF 2.6 2区 社会学
Population Space and Place Pub Date : 2025-09-18 DOI: 10.1002/psp.70106
Manuel T. Valdés, Cristina Suero, Fabrizio Bernardi
{"title":"Spatial Variation in the Educational Gradient of First Motherhood in Spain: Occurrence and Timing","authors":"Manuel T. Valdés,&nbsp;Cristina Suero,&nbsp;Fabrizio Bernardi","doi":"10.1002/psp.70106","DOIUrl":"10.1002/psp.70106","url":null,"abstract":"<p>Several studies have analyzed the relationship between educational attainment and fertility across countries, identifying significant differences. However, these works often overlook intra-country variation, which may play an important role in moderating that relationship. This study examines the heterogeneity in the educational gradient of fertility across Spain, a context characterized by lowest-low and latest-late fertility. Using data from the 2011 Spanish census, we reconstruct the reproductive history of 656,248 women aged 25–50, of whom 403,140 had become mothers. This large sample allows to analyze the educational gradient in first motherhood across Spanish provinces. To do so, we apply mixture cure models, which enable us to differentiate between the occurrence and the timing of the transition. The results reveal substantial regional variability in the educational gradient for both dimensions, although the association between the gradients in occurrence and timing is weak across space. We further find that cross-province variation in the educational gradient in the timing of the transition is largely driven by the heterogeneous behavior of non-university educated women, a pattern not observed for occurrence. Finally, we identify a negative association between the educational gradient and the province's GDP per capita, particularly strong for the timing of the transition.</p>","PeriodicalId":48067,"journal":{"name":"Population Space and Place","volume":"31 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/psp.70106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145084160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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