Genetic diversity is essential for population survival and adaptation to changing environments. Demographic processes (e.g., bottleneck and expansion) and spatial structure (e.g., migration, number, and size of populations) are known to shape the patterns of the genetic diversity of populations. However, the impact of temporal changes in migration on genetic diversity has seldom been considered...

This study examined the relationships among cognitive variables, family immigration history, negative life events, and depressive symptoms in a sample of 306 low-income, urban fifth- and sixth-grade children. Explanatory style and negative automatic thoughts were the cognitive variables examined. There were three key findings. First, children who were immigrants reported significantly more depr...

Migratory birds often follow detours when confronted with ecological barriers, and understanding the extent and the underlying drivers of such detours can provide important insights into the associated cost to the annual energy budget and the migration strategies. The Qinghai-Tibetan Plateau is the most daunting geographical barrier for migratory birds because the partial pressure of oxygen is ...

Climate-induced phenological shifts can influence population, evolutionary, and ecological dynamics, but our understanding of these phenomena is hampered by a lack of long-term demographic data. We use a multi-decade census of 5 salmonid species representing 14 life histories in a warming Alaskan stream to address the following key questions about climate change and phenology: How consistent ar...

It seems like a day does not go by in the United States without hearing about immigration on televised news broadcasts, print news stories, radio talk shows, or Internet blogs. Immigration, more specifically “illegal immigration,” is a hot topic in the U.S., perhaps fueled by the fact that 2008 is a presidential election year. Furthermore, since the issue of illegal immigration tends to divide ...

the main purpose of this study was to explore factors influencing immigration from rural to urban areas in varkaneh , a famous village and tourist destination located in western part of iran- hamedan. a questionnaire was designed and validated by a panel of experts from extension education dept. of bu-ali sina university and hamadan jihad of agriculture. its reliability was secured by cronbach’...

Australian immigration detention centres are in secluded locations, some on offshore islands, and are subject to extreme secrecy, comparable with 'black sites' elsewhere. There are parallels between healthcare professionals working in immigration detention centres and healthcare professionals involved with or complicit in torture. In both cases, healthcare professionals are conflicted between a...

Immigration and Public Spending We examine the effect of immigration on public spending from a theoretical (political economic) and an empirical perspective. We distinguish between public spending on private goods and on public goods. Our model implies that whether immigration increases or decreases public spending primarily depends on native’s preferences for private versus public good spendin...

Objective. Immigration and the economy were the most salient issues in British politics at the 2010 general election, yet the relationship between them remains unclear. This article questions whether perception of the economic situation influenced hostility to immigration to Britain during the 2010 general election campaign. Method. This article employs a logistic regression model using the 201...

This paper presents a new method to correct for measurement error in wage data and applies this method to address an old question. How much downward wage flexibility is there in the U.S? We apply standard methods developed by Bai and Perron (1998b) to identify structural breaks in time series data. Applying these methods to wage histories allows us to identify when each person experienced a cha...