نتایج جستجو برای: Immigration

تعداد نتایج: 10726  

Journal: :Nature communications 2016
Stephan Schiffels Wolfgang Haak Pirita Paajanen Bastien Llamas Elizabeth Popescu Louise Loe Rachel Clarke Alice Lyons Richard Mortimer Duncan Sayer Chris Tyler-Smith Alan Cooper Richard Durbin

British population history has been shaped by a series of immigrations, including the early Anglo-Saxon migrations after 400 CE. It remains an open question how these events affected the genetic composition of the current British population. Here, we present whole-genome sequences from 10 individuals excavated close to Cambridge in the East of England, ranging from the late Iron Age to the midd...

Journal: :Social science research 2016
Joakim Ruist

This study investigates the effects of the macroeconomic context on attitudes to immigration. Earlier studies do in some cases not provide significant empirical support for the existence of important such effects. In this article it is argued that this lack of consistent evidence is mainly due to the cross-national setup of these studies being vulnerable to estimation bias caused by country-spe...

2016
Annie Ro Arline Geronimus John Bound Derek Griffith Gilbert Gee

Education usually shows a relationship with self-rated health such that those with highest education have the best health and those with lowest education have the worst health. We examine these educational gradients among Asian immigrants and whether they differ by country of origin, duration in the United States, and generational status. Migration theories suggest that recent immigrants from p...

Journal: :Journal of mathematical biology 2006
H Seno

We consider a mathematical model for the group size determination by the intra-reactions, self-growth, ostracism and fission within a group, and by the inter-reactions, immigration and fusion between two groups. In some group reactions, a conflict between two groups occurs about the reaction to change the group size. We construct a mathematical model to consider such conflict, taking into accou...

2017
Bridget Byrne

Citizenship tests are designed to ensure that new citizens have the knowledge required for successful 'integration'. This article explores what those who have taken the test thought about its content. It argues that new citizens had high levels of awareness of debates about immigration and anti-immigration sentiment. Considering new citizens' views of the test, the article shows how many of the...

Journal: :Biology letters 2012
Jakob Brodersen P Anders Nilsson Ben B Chapman Christian Skov Lars-Anders Hansson Christer Brönmark

Migration is an important event in the life history of many animals, but there is considerable variation within populations in the timing and final destination. Such differential migration at the population level can be strongly determined by individuals showing different consistencies in migratory traits. By tagging individual cyprinid fish with uniquely coded electronic tags, and recording th...

Journal: Iranian Economic Review 2013

This paper considers the relationship between economic factors and national security. While considering a broad number of issue areas, the principal theme of the course is the way in which economic factors (as immigration) fundamentally influence the national security of the region, and the way in which those factors shape and constrain the strategies chosen to pursue that security. South-South...

2015
Rachel Bennett Victoria Hosegood Marie-Louise Newell Nuala McGrath

Despite the removal of restrictions on movement and increasing female participation in migration, only a minority of migrant parents in South Africa include their children in their destination household. Quantitative analyses of the circumstances in which children accompany a migrant parent have been limited by the lack of available data that document family arrangements from the perspective of...

2006
George J. Borjas

This paper presents a theoretical and empirical study of how immigration influences the joint determination of the wage structure and internal migration behavior for native-born workers in local labor markets. Using data from the 1960–2000 decennial censuses, the study shows that immigration is associated with lower in-migration rates, higher out-migration rates, and a decline in the growth rat...

Journal: :Journal of urban economics 2011
Leo Feler J Vernon Henderson

Localities in developed countries often enact regulations to deter low-income households from moving in. In developing countries, such restrictions lead to the emergence of informal housing sectors. To deter low-income migrants, localities in developing countries withhold public services to the informal housing sector. Using a large sample of Brazilian localities, we examine migration and exclu...

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