Immigration can impact educational decisions of natives through two different margins. First, it can increase the potential returns to education by generating a larger supply of unskilled workers, thus raising the relative wages of more educated individuals. Secondly, it can increase the cost of acquiring education through crowding out natives of public schools. We separate these two channels b...

Sexually selected feticide-the death of infants in utero as a result of male behaviour-has only rarely been described or analysed, although it is presumed to be favoured by the same selective pressures that favour sexually selected infanticide. To test this hypothesis, we measured the frequency of feticide and infanticide by male baboons of the Amboseli basin in Kenya, and examined which charac...

Immigration is a phenomenon of growing significance in many countries. Increasing social tensions are leading to political pressure to limit a further influx of foreign-born persons on the grounds that the absorption capacity of host countries has been exceeded and social cohesion threatened. There is also in public discourse a common perception of immigration resulting in economic costs, parti...

We applied the concept of source-sink dynamics to investigate a recent (1999-2013) increase in the occurrence of the siphonophore Muggiaea atlantica in Scottish coastal waters. Our aim was to determine whether this change represented the establishment of resident populations (i.e. "sources"), or transient populations reliant on immigration (i.e. "sinks"). First, we show that local production wa...

"This paper utilizes 1980-89 data on Florida's metropolitan areas to test the hypothesis that fiscal variables have differing influences on the in-migration of the aged as compared to the general population. The model, which is based on the Tiebout hypothesis, tests the role of variables which represent public school-related finances and public assistance.... Consistent with the Teibout theory,...

Since the 1960s research on immigration and integration in the Federal Republic of Germany has evolved from an emphasis on 'social problems' of labor migrants (Ausliinderforschung) to questions of immigration control, citizenship and ethnic pluralism ('multiculturalism'). Early research on migration in the 1960s and 1970s dealt with the specific problems associated with the recruitment of labor...

Previous research has reached mixed conclusions about whether higher levels of immigration reduce the wages of natives. This paper reexamines this question using data from the Current Population Survey and the Immigration and Naturalization Service and focuses on differential effects by skill level. Using occupation as a proxy for skill, we find that an increase in the fraction of workers in an...

OBJECTIVE Chronic diseases are the leading causes of death in the United States. Chronic disease management occurs within all aspects of an individual's life, including the workplace. Though the social constructs of gender, race, class, and immigration status within the workplace have been considered, their connection to disease management among workers has been less explicitly explored. Using ...

First generation immigrants to the U.S. have higher fertility rates than natives. This paper analyzes to what extent this factor provides political support for immigration, using an overlapping generation model with production and capital accumulation. In this setting, immigration represents a dynamic trade-off for native workers as more immigrants decrease current wages but increase the future...