Health Selection,Migration, and HIV Infection in Malawi

Despite its importance in studies of migrant health, selectivity of migrants—also known as migration health selection—has seldom been examined in sub-Saharan Africa (SSA). This neglect is problematic because several features of the context in which migration occurs in SSA—very high levels of HIV, in particular—differ from contextual features in regions that have been studied more thoroughly. To address this important gap, we use longitudinal panel data from Malawi to examine whether migrants differ from nonmigrants in pre-migration health, assessed via SF-12 measures of mental and physical health. In addition to overall health selection, we focus on three more-specific factors that may affect the relationship between migration and health: (1) whether migration health selection differs by destination (rural-rural, rural-town, and rural-urban), (2) whether HIV infection moderates the relationship between migration and health, and (3) whether circular migrants differ in pre-migration health status. We find evidence of the healthy migrant phenomenon in Malawi, where physically healthier individuals are more likely to move. This relationship varies by migration destination, with healthier rural migrants moving to urban and other rural areas. We also find interactions between HIV-infected status and health: HIV-infected women moving to cities are physically healthier than their nonmigrant counterparts.     

流动人口在城市劳动力市场中的地位:三群体研究

关于流动人口在城市劳动力市场中的地位问题,过去已有大量文献,但研究重点是农民工。这里把外来市民纳入观察视野,利用2008年"迁移和流动劳动力与中国大城市发展"调查数据,分析工资收入和社会保险参与的影响因素。主要研究发现:在工资收入上,不同户籍身份劳动者之间没有净差异;在养老保险和工伤保险参与上,本市居民、外来市民和农民工参与的可能性依次递减。这意味着,工资收入已经基本上由劳动力市场决定,而社会保险参与依然与户籍身份有关。不过,这种关联方式已经从过去的城乡户籍身份歧视转向本地/非本地权益差异。     

新生代农民工与城市居民社会距离实证研究

本文根据抽样调查的结果,探讨新生代农民工与城市居民社会距离状况及影响因素。本研究发现,新生代农民工还没有完全融入城市居民的生活圈,存在着一定的社会隔离。回归分析结果表明,性别、是否独生子女、城市生活体验、社区参与程度、相对剥夺感对其与城市居民的社会距离感有显著性影响。     

我国人口流动中的健康选择机制研究

利用2008年中国流动与健康调查数据,对农村留守人口、农村外出返乡人口、乡城流动人口以及城镇居民等不同流动特征群体之间的健康差异进行比较,并系统检验了我国人口流动过程中的两种健康选择机制——"健康移民"(healthy migrant)效应和"三文鱼偏误"(salmon bias)效应。模型分析结果表明,我国人口流动存在着较为明显的"健康移民"和"三文鱼偏误"选择效应。在控制被访者的年龄、性别、主要社会经济特征以及相关健康行为后,流动人口自评一般健康、慢性病状况、经常性身体不适和肺活量等健康指标显著优于农村留守人口,乡城流动人口患有慢性病和出现经常性身体不适的可能性也显著低于农村返乡人口。在控制相关变量后,乡城流动人口与城镇居民的健康状况(除慢性病和心率过高症状外)不存在显著差别。     

Is There an Urban Advantage in Child Survival in Sub-Saharan Africa? Evidence From 18 Countries in the 1990s

Evidence of higher child mortality of rural-to-urban migrants compared with urban nonmigrants is growing. However, less attention has been paid to comparing the situation of the same families before and after they migrate with the situation of urban-to-rural migrants. We use DHS data from 18 African countries to compare child mortality rates of six groups based on their mothers’ migration status: rural nonmigrants; urban nonmigrants; rural-to-urban migrants before and after they migrate; and urban-to-rural migrants before and after they migrate. The results show that rural-to-urban migrants had, on average, lower child mortality before they migrated than rural nonmigrants, and that their mortality levels dropped further after they arrived in urban areas. We found no systematic evidence of higher child mortality for rural-to-urban migrants compared with urban nonmigrants. Urban-to-rural migrants had higher mortality in the urban areas, and their move to rural areas appeared advantageous because they experienced lower or similar child mortality after living in rural areas. After we control for known demographic and socioeconomic correlates of under-5 mortality, the urban advantage is greatly reduced and sometimes reversed. The results suggest that it may not be necessarily the place of residence that matters for child survival but, rather, access to services and economic opportunities.     

城市外来人口居住条件对其健康影响之考察——以上海为例

本文利用上海2008年的抽样调查数据,考察了一个特别重要但是长期被忽视的群体——城市外来人口居住条件和健康的问题。通过与本地居民的对比,发现外来人口的身心健康好于本地居民,但在居住条件、尤其是住房条件各方面均表现出对本地居民的明显劣势。回归分析结果说明,控制人口和社会经济变量,居住条件的确是影响城市外来人口健康的重要社会因素之一,但对于不同的健康指标,不同居住条件变量作用的大小和方向有所不同。此外,对居住条件与户籍身份的交互作用分析显示,居住条件对城市外来人口健康的影响总体上弱于对本地居民健康的影响,不同的居住条件变量对城市外来人口与本地居民健康的影响关系有所不同。这一结论将有助于政府部门制定更加适合外来人口的改善居住条件与健康状况的相关政策。     

Selectivity Of Migrants To A Metropolis In A Developing Country: A Mexican Case Study

A proper evaluation of native-migrant differences requires information on migrant selectivity. Are migrants positively or negatively selective or are they representative of the populations from which they originate? This question was posed for a sample of male migrants to Monterrey, Mexico, a rapidly growing metropolis in a developing country. A comparison was made between the characteristics of migrants and census information for the origin populations for 1940 and 1960. Overall, in terms of education and occupational position, migrants are positively selective. However, using three time-of-arrival cohorts, it is shown that migrants have become less selective over time. There has been a shift from a “pioneer” to a “mass” pattern of migration, with the latter group more closely approximating the characteristics of the origin population. Besides having lower educational and skill levels, the “mass” migrants are more likely to be made up of married men and their families. To the extent that the Monterrey pattern will be encountered in other large and fast-growing urban areas in Latin America, it suggests that the assimilation of migrants in these places will become more rather than less difficult.     

Rural-to-urban Migration and Rising Evaluation Standards for Subjective Social Status in Contemporary China

People’s evaluation standards in rating social status may evolve when exterior living circumstances change, and studying whether and how migration process changes individuals’ evaluation standards in rating social status can shed new light on this issue. Utilizing the dataset from 2010–2012 China Family Panel Studies and by employing the anchoring vignette method, this study reveals for the first time that rural-to-urban migrants adopt higher standards than those who stay behind in the countryside, but their evaluation standards still remain significantly lower than those adopted by urban residents. Heterogeneity in transitions of reference points within the migrants group is also explored. Except for the eldest cohort, all other younger migrants employ significantly higher standards in rating social status than rural villagers; the new generation of migrants is not significantly different from the elder in terms of the evaluation standards. More importantly, the increase in evaluation standards of migrants becomes greater through the years, from the moment of departure from one’s hukou registration place. These findings challenge the prevalent practice of assigning or assuming an ad hoc reference group to migrants in many studies, and advance our understanding on the determinants of the reference points used to evaluate social status, on which little is known so far.     

城市流动人口社会融合的过程、测量及影响因素

本文提出流动人口的社会融合是一个逐步同化和减少排斥的过程,是流动人口对城市的主观期望和城市的客观接纳相统一的过程,是本地人口和外来移民发生相互交往和构建相互关系的过程。本文通过模型分析,验证了流动人口社会融合影响因素的三个假设,即流动人口的个人和家庭状况影响社会融合;流动人口的社区参与和社会资本影响社会融合;城市的制度安排影响流动人口的社会融合。     

The Standard of Living of the Workers in a Spanish Industrial Town: Wages,Nutrition, Life Expentancy and Heigth in Alcoy (1870–1930)

This is the first study that empirically examines how migration influences migrants’ time use patterns in China, utilizing a mixed-method approach. We systematically estimate the migration effects on weekly hours on working, leisure, personal care and domestic responsibilities, based on data from the nationally representative 2010 Chinese Family Panel Studies. We then supplement these analyses with in-depth interviews conducted in Beijing to further understand the underlying mechanisms. Compared with urban locals, rural-to-urban migrants have longer work hours and less leisure time. The largest differences are found among men. On average, migrant men work 5 h longer and have 7 fewer hours of leisure per week than urban local men. These differences are moderated by migrants’ and their parents’ socioeconomic status, and their family responsibilities. The in-depth interviews reveal that the busier work schedules are largely motivated by the transient nature of most rural-to-urban migration and the overwhelming economic pressures for household establishment and career development.     

流动人口社会融合的测量及理论思考

文章简要归纳国内外社会融合理论和测量指标,检讨并重构个体层次的社会融合测量指标体系,讨论当前研究中的几个重要理论问题,认为流动人口的社会融合总是处在从适应到区隔融合、再到融合这三个阶段中的某一点上,在构建测量指标体系时所用的概念与变量应有较高的效度和简约性,且要与理论相对应。社会融合包括经济融合、文化适应、社会适应、结构融合和身份认同这五个维度。关于我国迁移与流动人口社会融合的最终方向问题、扩展以社会融合为中心的因果链等应是未来研究的重要方面,今后的研究应该注意主流社会的定义、社会融合结果导致的社会流动方向的判断标准、分析单位等,并加强长期的跟踪研究,以便及时掌握流动人口的社会融合现状及其发展轨迹。     

Minority status and family size: A comparison of explanations

In this study, the family sizes of Chinese, Japanese and Filipino Americans are compared with those of whites, using data from the 1970 public use samples for California and Hawaii. The two hypotheses derived from the ‘minority status’ hypothesis are tested; the latter states that minorities experience tensions and anxiety which lead to lower fertility compared with native whites of Anglo-Saxon ancestry under certain conditions. We also examine the effect of assimilation in terms of variables known to affect fertility, and control for several age and acculturation variables.

Analysis, based on a regression decomposition model, gives some support to the argument that the family size of minority groups differs from that of native whites because of incomplete assimilation and because independent variables affect fertility differently. However, since the independent effect of minority status per se is generally to raise fertility for Japanese and Chinese Americans, and lower it for Filipinos, we reject this version of the minority status hypothesis. Our general conclusion is that family size differentials in a pluralistic society may be part of a persisting pattern of sub-cultural differentiation, and do not necessarily reflect any ‘tensions and anxiety’ of minority status.     

Assimilation and Health: Evidence From Linked Birth Records of Second- and Third-Generation Hispanics

This study explores the effects of assimilation on the health of Hispanics in the United States, using ethnic intermarriage as a metric of acculturation. I exploit a unique data set of linked confidential use birth records in California and Florida from 1970–2009. The confidential data allow me to link mothers giving birth in 1989–2009 to their own birth certificate records in 1970–1985 and to identify second-generation siblings. Thus, I can analyze the relationship between the parental exogamy of second-generation Hispanic women and the birth outcomes of their offspring controlling for grandmother fixed effects as well as indicators for second generation’s birth weight. Despite their higher socioeconomic status, third-generation children of second-generation intermarried Hispanic women are more likely to have poor health at birth, even after I account for second-generation health at birth and employ only within-family variations in the extent of assimilation. I find that a second-generation Hispanic woman married to a non-Hispanic man is 9 % more likely to have a child with low birth weight relative to a second-generation woman married to another Hispanic. These results largely reflect the higher incidence of risky behaviors (e.g., smoking during pregnancy) among intermarried Hispanic women.     

Urbanization and the fertility transition in Ghana

This paper examines the way in which migration and urban residence operate to alter fertility outcomes. While urban-rural fertility differentials have long been established for most developing societies, the nature of these differences among migrants and between migrants and those of succeeding generations is not well understood. The evidence presented here suggests that rural-urban migration and urbanization may contribute positively to processes of fertility transition. Using data from the 1998 Kumasi Peri-Urban Survey, which included a 5-year retrospective monthly calendar of childbearing, we suggest that migrants adapt quickly to an urban environment. Our results also reveal generational differences in recent and cumulative fertility. While migrants exhibit higher cumulative fertility than urban residents of the second and third generation, their fertility is significantly lower than rural averages in Ghana. Children of migrants exhibit childbearing patterns quite similar to those in higher-order generations. Most noteworthy is the nature of the disparities in childbearing patterns between migrants and the succeeding generations. Migrant women have higher lifetime fertility than urban natives. Migrant women also exhibit higher fertility over the last 5 years than second generation or high-order urban natives. But these first generation women exhibit lower fertility (vs. urban natives) for the year immediately prior to the survey. These patterns lend support to an interpretation that combines rather than opposes theories of selectivity, disruption, adaptation and socialization. We conclude by discussing mechanisms that might explain these interrelated processes of fertility adjustment and suggest that policies discouraging rural-urban migration need to be revisited.     

Buying membership in the transnational community:migrant remittances,social status,and assimilation

I analyze the effects that social status and immigrant incorporation have on migrant remittances. Understanding remittances as one type of transnational practice, I conceptualize them as the fee that migrants pay to remain members of the transnational community. I define a “status hypothesis” in terms consistent with the view of transnational engagement as a response to status loss, predicting a negative association between increases in social status and remittances. Since immigrant incorporation usually entails status gain, this hypothesis is consistent with the conventional assimilation paradigm. While the status hypothesis could be linked to the new economics of labor migration as well, it collides with the view of transnationalism as an alternative path for successful immigrant incorporation. Using data on male Mexican migrants to the United States, I find enough support for the status hypothesis, indicating the need to clarify the ultimate meaning of transnational practices. In addition, my analysis shows that there is room to integrate economic theory, the assimilation paradigm, and the transnational perspective into a comprehensive understanding of transnational engagement.     

Minority status and family size: A comparison of explanations

Summary In this study, the family sizes of Chinese, Japanese and Filipino Americans are compared with those of whites, using data from the 1970 public use samples for California and Hawaii. The two hypotheses derived from the 'minority status' hypothesis are tested; the latter states that minorities experience tensions and anxiety which lead to lower fertility compared with native whites of Anglo-Saxon ancestry under certain conditions. We also examine the effect of assimilation in terms of variables known to affect fertility, and control for several age and acculturation variables. Analysis, based on a regression decomposition model, gives some support to the argument that the family size of minority groups differs from that of native whites because of incomplete assimilation and because independent variables affect fertility differently. However, since the independent effect of minority status per se is generally to raise fertility for Japanese and Chinese Americans, and lower it for Filipinos, we reject this version of the minority status hypothesis. Our general conclusion is that family size differentials in a pluralistic society may be part of a persisting pattern of sub-cultural differentiation, and do not necessarily reflect any 'tensions and anxiety' of minority status.     

贸易自由化环境中的女性迁移流动及其对生殖健康的影响

贸易自由化引致包括女性劳动力在内的大规模乡城劳动力迁移 ,不可避免地影响着流动女性的生殖健康。通过分析社会经济相关因素以及各级政府管理、服务因素 ,本文认为贸易自由化促进的劳动力迁移对女性劳动者的生殖健康产生一定的积极影响 ;但同时 ,户籍制度的限制、工作生活环境的压力以及生殖健康服务的缺乏也在威胁流动女性的生殖健康。由此提出 :在贸易自由化的环境中改进流动人口计划生育管理和生殖健康服务 ,不但有利于流动女性的健康和发展 ,也是经济社会可持续发展的要求     

Simulating the Effects of Acculturation and Return Migration on the Maternal and Infant Health of Mexican Immigrants in the United States: A Research Note

A significant body of research on minority health shows that although Latino immigrants experience unexpectedly favorable outcomes in maternal and infant health, this advantage deteriorates with increased time of residence in the United States. This study evaluates the underlying assumptions of two competing hypotheses that explain this paradox. The first hypothesis attributes this deterioration to possible negative effects of acculturation and behavioral adjustments made by immigrants while living in the United States, and the second hypothesis attributes this deterioration to the mechanism of selective return migration. Hypothetical probabilistic models are simulated for assessing the relationship between duration and birth outcomes based on the assumptions of these two hypotheses. The results are compared with the empirical research on the maternal and infant health of first-generation, Mexican-origin immigrant women in the United States. The analysis provides evidence that a curvilinear pattern of duration and birth outcomes can be explained by the joint effects of both acculturation and selective return migration in which the former affects health status over the longer durations, and the latter affects health status at shorter durations.     

The Consequences of Migration to the United States for Short-Term Changes in the Health of Mexican Immigrants

Although many studies have attempted to examine the consequences of Mexico-U.S. migration for Mexican immigrants’ health, few have had adequate data to generate the appropriate comparisons. In this article, we use data from two waves of the Mexican Family Life Survey (MxFLS) to compare the health of current migrants from Mexico with those of earlier migrants and nonmigrants. Because the longitudinal data permit us to examine short-term changes in health status subsequent to the baseline survey for current migrants and for Mexican residents, as well as to control for the potential health selectivity of migrants, the results provide a clearer picture of the consequences of immigration for Mexican migrant health than have previous studies. Our findings demonstrate that current migrants are more likely to experience recent changes in health status—both improvements and declines—than either earlier migrants or nonmigrants. The net effect, however, is a decline in health for current migrants: compared with never migrants, the health of current migrants is much more likely to have declined in the year or two since migration and not significantly more likely to have improved. Thus, it appears that the migration process itself and/or the experiences of the immediate post-migration period detrimentally affect Mexican immigrants’ health.     

Rural-urban migration and the social mobility of individuals in the Republic of Korea: an analysis of life history data

The paper explores the impact of rural-to-urban migration on the social mobility of individuals, comparing rural-to-urban migrants with rural and urban natives. Using life history data from the 1983 Korean National Migration Survey, the authors examined the pattern of migrant adjustment by estimating the 1st difference form of the autoregressive equation. They found a disruptive effect of rural-to-urban migration that disappears gradually after migration. This study provides strong evidence that most rural-to-urban migrants successfully adapt to urban life through upward occupational mobility relative to both rural and urban natives. This finding sharply contrasts with previous studies on the urban informal sector, which emphasize selective rural-to-urban migration or the inability of migrating individuals to adapt to city life. Moreover, this study showed that a principle cause of the rapid expansion of Seoul is that migrants are more likely to be upwardly mobile when they are destined for Seoul rather than other cities.