Immigration, Citizenship, and the Size of Government This paper analyzes the political sustainability of the welfare state in an environment where immigration is the main demographic force and where governments are able to influence the size and skill composition of immigration flows. Specifically, I present a dynamic politicaleconomy model where both income redistribution and immigration polic...

Abstrac t . Stream landscapes are highly variable in space and time and, like terrestrial landscapes, the resources they contain are patchily distributed. Organisms may disperse among patches to fulfill life-history requirements, but biotic and abiotic factors may limit patch or locality occupancy. Thus, the dynamics of immigration and extinction determine, in part, the local structure of assem...

Objective. Survey research posits that Mexican Americans’ perceptions of the costs and benefits of immigration drive their opinions about immigration, but this research does not provide a clear picture of how Mexican Americans calculate these costs and benefits. This article aims to understand the processes that explain how Mexican Americans calculate the costs and benefits of Mexican immigrati...

BACKGROUND Migrant populations consist of migrants with differences in generational status and length of residence. Several studies suggest that health outcomes differ by generational status and duration of residence. We examined the association of generational status and age at immigration of the mother with infant mortality in migrant populations in The Netherlands. METHODS Data from Statis...

We tested the hypothesis that temporally autocorrelated variation should increase the abundance of an inferior competitor sustained by immigration. Temporally autocorrelated variability can increase abundance of the inferior species through effects on demography, the strength of competition, and the mean and variance in the abundance of competing species. We allowed the competitive inferior to ...

Theoretical studies of adaptation to sink environments (with conditions outside the niche requirements of a species) have shown that immigration from source habitats can either facilitate or inhibit local adaptation. Here, we examine the influence of immigration on the evolution of local adaptation, given an Allee effect (i.e., at low densities, absolute fitness increases with population densit...

Americans' conflicted attitudes toward immigrants and immigration has stymied immigration reform for decades. In this article, we explore the nuanced nature of stereotypes about immigrants and how they relate to ambivalent attitudes toward immigrant groups and the disparate array of immigration policies that affect them. Using item response theory and multiple regression analysis, we identified...

Does immigration generate jobs in an MSA, or do employment opportunities entice immigrant inflows to an MSA? Is immigration responsible for higher unemployment, or do foreign-born inflows cause increases in self-employment that lead to improvement in labor market conditions? The causal relationship between immigrants, job growth and unemployment is a politically and economically salient subject...

OBJECTIVES To identify, explore and critique features of how practices associated with immigration medicine are socially organized. Specifically, how the work of designated medical practitioners (DMP) - physicians who conduct immigration medical examinations of prospective immigrants to Canada as contractors to the Canadian government department of Citizenship and Immigration Canada - is organi...