Public Use Data on Mexican Immigration

 描述（由申请人提供）：该提案要求为墨西哥移民项目重新提供资金，以收集和传播有关墨西哥向美国移民的有证和无证移民的高质量数据。MMP自1982年以来一直在该领域开展工作，并从1987年起不断获得NICHD的资助。该数据库已成为研究墨西哥向美国移民的主要工具，并成为在中国、波兰、乌克兰、西非、摩洛哥、孟加拉国和拉丁美洲其他地方进行类似数据收集工作的典范，产生了越来越多的使用可比方法和工具收集的数据（见Massey和Capoferro，2004年）。 MMP最初集中在墨西哥中西部--瓜纳华托、哈利斯科、米却肯、圣路易斯波托西和萨卡特卡斯等州。这些州一直占美国所有移民的至少一半，代表着美国历史上的心脏地带。束缚迁移然而，在20世纪90年代，新的移民来源出现在墨西哥政治经济和MMP调查人员的结构性变化扩大了数据收集的地理范围，包括全国各地的新的发送区域，最终汇编样本从24个墨西哥的32个州。这些州加起来占墨西哥领事身份证登记的所有无证移民的近90%（Massey，Rugh和Pren 2010）。 在这一点上，MMP数据库中最严重的地理遗漏是墨西哥的联邦区，该地区约占所有登记领事身份证的无证移民的7%。在未来一段时间内，这一差距将通过调查墨西哥城的社区来填补。鉴于最近无证离境的可能性下降，而具有法律的身份的流动频率上升，我们还建议调查墨西哥中西部的新社区，因为这一地区提供了最长的移民历史和最大的移民经验，以评估长期趋势的性质和原因。与此同时，我们还将继续在墨西哥中部地区的新原产地进行调查。我们还提议采用一种创新的新方法，扩大对居住在美国的大量无证移民的覆盖面，并将在调查工具中增加新的问题，以评估暴力对移民到美国的影响，并逐步建立一个能够领导该项目的新的调查小组。

 DESCRIPTION (provided by applicant): This proposal requests a renewal of funding for the Mexican Migration Project to gather and disseminate high quality data on documented and undocumented Mexican migration to the United States. The MMP has been in the field since 1982 and from 1987 onward has received continuous funding from NICHD. The database has become a mainstay for research on Mexican migration to the United States and a model for similar data collection efforts in China, Poland, Ukraine, West Africa, Morocco, Bangladesh, and elsewhere in Latin America, yielding a growing body of data collected using comparable methods and instruments (see Massey and Capoferro 2004). The MMP initially focused on west-central Mexico-the states of Guanajuato, Jalisco, Michoacán, San Luís Potosí, and Zacatecas. These states have consistently accounted for at least half of all migrants to the United States and represent the historical heartland for U.S.-bound migration. During the 1990s, however, new migration sources emerged in response to structural changes in the Mexican political economy and MMP investigators expanded data collection geographically to include new sending regions throughout the country, eventually compiling samples from 24 of Mexico's 32 states. Together these states account for almost 90% of all undocumented migrants who registered for Mexico's consular ID card (Massey, Rugh, and Pren 2010). At this point, the most serious geographic omission in the MMP database is Mexico's Federal District, which accounts for around 7% of all undocumented migrants who registered for the consular ID card. In the coming period this gap will be filled by surveying neighborhoods in Mexico City. Given recent declines in the likelihood of undocumented departure and the rising frequency of circulation in legal status, we also propose to survey new communities in west-central Mexico, as this region offers the longest history of migration and the largest stock of migratory experience to assess the nature and reasons for trends over time. At the same time, we also will continue to conduct surveys in new origin areas located in Mexico's central region. We also propose to use an innovative new approach to improve coverage of the large population of undocumented migrants living in the United States and will add new questions to the survey instrument to assess the effect of violence on migration to the United States, and also to phase in a new team of investigators capable of leading the project into the future.