Moving Beyond Salmon Bias: Mexican Return Migration and Health Selection

Despite having lower levels of education and limited access to health care services, Mexican immigrants report better health outcomes than U.S.-born individuals. Research suggests that the Mexican health advantage may be partially attributable to selective return migration among less healthy migrants—often referred to as “salmon bias.” Our study takes advantage of a rare opportunity to observe the health status of Mexican-origin males as they cross the Mexican border. To assess whether unhealthy migrants are disproportionately represented among those who return, we use data from two California-based studies: the California Health Interview Survey; and the Migrante Study, a survey that samples Mexican migrants entering and leaving the United States through Tijuana. We pool these data sources to look for evidence of health-related return migration. Results provide mixed support for salmon bias. Although migrants who report health limitations and frequent stress are more likely to return, we find little evidence that chronic conditions and self-reported health are associated with higher probabilities of return. Results also provide some indication that limited health care access increases the likelihood of return among the least healthy. This study provides new theoretical considerations of return migration and further elucidates the relationship between health and migration decisions.     

International Migration, Sex Ratios, and the Socioeconomic Outcomes of Nonmigrant Mexican Women

This article assesses whether international migration from Mexico affects the marital, fertility, schooling, and employment outcomes of the Mexican women who remain behind by exploiting variation over time as well as across Mexican states in the demographic imbalance between men and women. I construct a gauge of the relative supply of men for women of different age groups based on state-level male and female population counts and the empirically observed propensity of men of specific ages to marry women of specific ages. Using Mexican census data from 1960 through 2000, I estimate a series of models in which the dependent variable is the intercensus change in an average outcome for Mexican women measured by state and for specific age groups, and the key explanatory variable is the change in the relative supply of men to women in that state/age group. I find that the declining relative supply of males positively and significantly affects the proportion of women who have never been married as well as the proportion of women who have never had a child. In addition, states experiencing the largest declines in the relative supply of men also experience relatively large increases in female educational attainment and female employment rates. However, I find little evidence that women who do marry match to men who are younger or less educated than themselves.     

Oil Spill Disruption and Problem Drinking: Assessing the Impact of Religious Context among Gulf Coast Residents

Population Research and Policy Review - While a wide body of research has indicated that social resources may be enhanced through religious practice, few studies have explored how social resources...     

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.     

Gender, Job Searching, and Employment Outcomes among Mexican Immigrants

Past quantitative research has typically disregarded the effect of gender on the relationship between social capital and immigrant adaptation. However, recent theory and qualitative evidence suggest that gender is a significant factor moderating this association. I use Mexican Migration Project (MMP) data regarding Mexican immigrant experiences in the U.S. to examine quantitatively how the process of job searching, and the effects of network-based job searching, vary by gender. Results show no evidence of overall sex differences in the likelihood of using network (i.e., family-based or friend-based) or individual (i.e., non-network) job search methods, but there are sex differences in the processes affecting job search method used. Settlement increases women’s use of their friend networks to obtain work, while for men, it decreases the use of networks of any kind. Contrary to conventional wisdom, women who use network-based job searches are less likely to obtain formal sector employment than women who find work without network assistance. Conversely, using network-based job searches increases the likelihood that men will find work in the formal sector. Since employment in the formal sector is correlated with wages, as well as nonwage benefits, this suggests that using networks in the job search has markedly different effects on the overall economic well-being of male and female Mexican immigrants in the U.S.     

An Integrated Analysis of Migration and Remittances: Modeling Migration as a Mechanism for Selection

Prior work has modeled individuals?? migration and remittance behavior separately, and reported mixed empirical support for various remittance motivations. This study offers an integrated approach, and considers migration as a mechanism for selection in a censored probit model of remittance behavior. This approach leads to different conclusions about the determinants of remittance behavior in the Thai internal migration setting. To the extent that these determinants capture different remittance motivations, as prior research has presumed, the analysis also provides varying support for these motivations. These results suggest that migration and remittance behavior are interrelated, and it is crucial for an analysis of remittance behavior to control for the selectivity of migration.     

Migration Selection, Protection, and Acculturation in Health: A Binational Perspective on Older Adults

In this article, we test for four potential explanations of the Hispanic Health Paradox (HHP): the “salmon bias,” emigration selection, and sociocultural protection originating in either destination or sending country. To reduce biases related to attrition by return migration typical of most U.S.-based surveys, we combine data from the Mexican Health and Aging Study in Mexico and the U.S. National Health Interview Survey to compare self-reported diabetes, hypertension, current smoking, obesity, and self-rated health among Mexican-born men ages 50 and older according to their previous U.S. migration experience, and U.S.-born Mexican Americans and non-Hispanic whites. We also use height, a measure of health during childhood, to bolster some of our tests. We find an immigrant advantage relative to non-Hispanic whites in hypertension and, to a lesser extent, obesity. We find evidence consistent with emigration selection and the salmon bias in height, hypertension, and self-rated health among immigrants with less than 15 years of experience in the United States; we do not find conclusive evidence consistent with sociocultural protection mechanisms. Finally, we illustrate that although ignoring return migrants when testing for the HHP and its mechanisms, as well as for the association between U.S. experience and health, exaggerates these associations, they are not fully driven by return migration-related attrition.     

New Estimates of Undocumented Mexican Migration and the Probability of Apprehension*

Using a new source of data, we estimate the probability of apprehension among Mexican migrants attempting to cross into the United States without documents. Over the period 1965-1989 we found an average apprehension probability of .35, confirming earlier estimates. We then applied annual probabilities to estimate the gross volume of undocumented Mexican migration and adjusted these figures to derive estimates of the net undocumented inflow.     

外出经历对农村妇女初婚年龄的影响

本文应用事件史分析方法，讨论了农村妇女初次外出时间与初婚年龄的关系。所用数据来自２０００年安徽、四川省４个县的问卷调查。研究发现，农村妇女的外出经历及外出时间对她们的初婚年龄有显著影响。在控制了其他变量的情况下，婚前曾经外出的妇女初婚年龄较大。婚前外出的流入地为外省或城市的妇女，初婚年龄大于其他婚前外出过的妇女。本研究结果显示农村到城市的劳动力流动有助于提高农村年轻妇女的初婚年龄。     

Migration and relationship power among mexican women

Our study drew on original data collected in Durham, NC, and four sending communities in Mexico to examine differences in women's relationship power that are associated with migration and residence in the United States. We analyzed the personal, relationship, and social resources that condition the association between migration and women's power and the usefulness of the Relationship Control Scale (RCS) for capturing these effects. We found support for perspectives that emphasize that migration may simultaneously mitigate and reinforce gender inequities. Relative to their nonmigrant peers, Mexican women in the United States average higher emotional consonance with their partners, but lower relationship control and sexual negotiation power. Methodologically, we found that the RCS is internally valid and useful for measuring the impact of resources on women's power. However, the scale appears to combine diverse dimensions of relationship power that were differentially related to migration in our study.     

MIS Promotes Contraception andReproductive Health: Yandu,Jiangsu

YanduCounty,JiangsuProvincehasmademuchheadwayinimprovingitsfamilyplanningservicesthroughaneffectivemanagementinformationsystem(MIS).DemographicsAreall,300squarekmPopulations920,000Birthratef&perthousandin1999,comparedto'23.65in1990Naturalincreaseratef1.5perthousand(1999)TheDevelopmentofinformationManagementThesystelllwastirstilltroducedin1993.In1994,alltowllsilltilecoulltywereequippedwitllInicrocolllputers.TileMISsoftwareOnthemanagementofcllildbearillg-agewonlell,developedbytheStateFal…     

选择性、传统还是适应:流动对农村育龄妇女男孩偏好的影响研究

我国人口的大规模流动正在改变着农村育龄妇女的生育观念,传统生育观念中的男孩偏好逐步弱化.文章梳理了流动对人们生育观念影响的相关理论,并通过对调查数据的分析,在控制了人口流动的选择偏差的条件下,比较了从未流动的农村育龄妇女和有流动经历的农村育龄妇女在男孩偏好方面的差异,并进一步研究了“流动时是否与丈夫在一起”的经历对农村育龄妇女男孩偏好的影响.结果表明,有流动经历和没有流动经历的妇女在男孩偏好方面确实存在显著的差异,这种差异一方面是由于流动的选择性造成的,另一方面也源于流动使妇女的生育观念更为现代化,弱化了她们的男孩偏好.但是,流出地的文化传统依然通过家庭和社区影响着妇女生育的性别偏好.     

Family Contexts and Schooling Disruption among Orphans in Post-Genocide Rwanda

This study examines the relationship between orphan status and schooling disruption in post-genocide Rwanda. The results indicate that while non-orphans have more favorable schooling outcomes in two-parent than in single-parent families, the reverse is true among Rwandan orphans. In single-mother households, paternal orphans, i.e. orphans with only a living mother, have better outcomes than their orphan and non-orphan counterparts. In contrast, paternal orphans have worse outcomes than other children in two-parent households, especially in households headed by males. Maternal orphans are more likely to experience schooling disruptions than non-orphans regardless of family structure. The maternal-orphan disadvantage is nevertheless greater in female-headed than in male-headed households. As expected, non-related orphans are more disadvantaged than orphans related to their household heads. However, non-related orphans have a greater disadvantage in two-parent than in single-parent households. The results also suggest that within households, the provision of childcare to children below schooling age is an impediment to orphan’s schooling. These impediments are, however, greater for double-orphans than paternal or maternal orphans.     

Migration and premarital childbearing among Puerto Rican women

This paper examines the relationship between migration and premarital childbearing in a highly migratory Latino subgroup, Puerto Rican women. Using pooled origin-destination data from surveys conducted in Puerto Rico and in the New York metropolitan area, we find that first- and second-generation migrants to the u.s. mainland face substantially higher risks of conceiving and bearing a first child before marriage than do nonmigrants in Puerto Rico. This pattern is due largely to the relatively early transition to sexual activity among mainland women. Given the negative long-term consequences of premarital childbearing for women and their children, our findings call into question the assumption that migrants necessarily experience only positive outcomes as a result of the assimilation process.     

Selection,context, or both? The English fluency of Mexican immigrants in the American Midwest and Southwest

Population Research and Policy Review -     

Target Fertility,Contraception, And Aggregate Rates: Toward A Formal Synthesis

This paper develops a stock adjustment model relating total expected births to conventional aggregate fertility rates for married women over 25. Each year, cohorts bear about 20 percent of their additional expected births. Aggregate U.S. rates have been consistent with expectations as expressed in surveys between 1955 and 1975; indeed, total expected births may be inferred from aggregate fertility behavior. A peculiar empirical finding is that the additional expected fertility of nonterminators has not changed since 1955, despite the dramatic decline in total expected and actual fertility. The model leads to a dynamic expression for the duration pattern of current and cumulative fertility and for the proportion of couples who have terminated childbearing. The model is also used to analyze the effects of changing contraceptive failure rates on fertility patterns. For example, a decline in “timing” failure rates increases duration-specific fertility five years later.