منابع مشابه
Biodiversity at the edge: a test of the importance of spatial "mass effects" in the Rothamsted Park Grass experiments.
The coexistence of many plant species competing for a few resources is one of the central puzzles of community ecology. One explanation is that different species may be competitively superior in different microhabitats. Many species could then coexist within each piece of a mosaic landscape by what has been termed "mass effects," because subpopulations in areas with negative growth rates would ...
متن کاملField Experiments
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متن کاملField Experiments
Experimental economists are leaving the reservation. They are recruiting subjects in the field rather than in the classroom, using field goods rather than induced valuations, and using field context rather than abstract terminology in instructions. We argue that there is something methodologically fundamental behind this trend. Field experiments differ from laboratory experiments in many ways. ...
متن کاملIdentifying Discrimination at Work: The Use of Field Experiments.
Antidiscrimination law offers protection to workers who have been treated unfairly on the basis of their race, gender, religion, or national origin. In order for these protections to be invoked, however, potential plaintiffs must be aware of and able to document discriminatory treatment. Given the subtlety of contemporary forms of discrimination, it is often difficult to identify discrimination...
متن کاملBalancing selection maintains polymorphisms at neurogenetic loci in field experiments.
Most variation in behavior has a genetic basis, but the processes determining the level of diversity at behavioral loci are largely unknown for natural populations. Expression of arginine vasopressin receptor 1a (Avpr1a) and oxytocin receptor (Oxtr) in specific regions of the brain regulates diverse social and reproductive behaviors in mammals, including humans. That these genes have important ...
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ژورنال
عنوان ژورنال: Nature
سال: 1885
ISSN: 0028-0836,1476-4687
DOI: 10.1038/032058a0