Search results for "individual heterogeneity"

showing 3 items of 3 documents

Testing hypotheses in evolutionary ecology with imperfect detection: capture-recapture structural equation modeling.

2012

8 pages; International audience; Studying evolutionary mechanisms in natural populations often requires testing multifactorial scenarios of causality involving direct and indirect relationships among individual and environmental variables. It is also essential to account for the imperfect detection of individuals to provide unbiased demographic parameter estimates. To cope with these issues, we developed a new approach combining structural equation models with capture-recapture models (CR-SEM) that allows the investigation of competing hypotheses about individual and environmental variability observed in demographic parameters. We employ Markov chain Monte Carlo sampling in a Bayesian frame…

0106 biological sciencesPopulation Dynamicsselection gradient analysesBiologystate-space models010603 evolutionary biology01 natural sciencesModels BiologicalStructural equation modelingMark and recapture010104 statistics & probabilitystructural equation modelslife history tradeoffsAnimalsPasseriformes0101 mathematicsSet (psychology)Ecology Evolution Behavior and SystematicsSelection (genetic algorithm)Ecosystemcapture-recapture models[ SDE.BE ] Environmental Sciences/Biodiversity and EcologyEcologyModel selectionCyanistesindividual heterogeneitybiology.organism_classificationCausalityBiological Evolutionevolutionary ecologyEvolutionary ecology[SDE.BE]Environmental Sciences/Biodiversity and EcologyEcology
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Establishment size and task-specific wages: Evidence from historical contract data

2014

This study examines whether task-specific jobs are rewarded differently across establishments of different sizes and whether these rewards vary across distinct technologies. We found that the aggregate premium estimates on the impact of size on wages conceal significant differences between tasks and technologies and that these differences reflect unobserved individual heterogeneity. The role of self-selection of more productive workers into larger establishments is particularly substantial in the case of abstract tasks. peerReviewed

Economics and EconometricsLabour economicsta511Individual heterogeneity05 social sciencesAggregate (data warehouse)050209 industrial relationsTask (project management)establishment sizepalkat0502 economics and business8. Economic growthEconomicsteknologiajob taskscontract data050207 economicsFinance
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Population-level consequences of risky dispersal

2014

Achieving sufficient connectivity between populations is essential for persistence, but costs of dispersal may select against individual traits or behaviours that, if present, would improve connectivity. Existing dispersal models tend to ignore the multitude of risks to individuals: while many assess the effect of mortality costs, there is also a risk of failing to find new habitat, especially when the entire inhabitable area remains both small and fragmented. There are few known rules governing whether individuals evolve to disperse more, or less, than what is ideal for population connectivity and persistence. Here we aim to fill this gap, while also noting that evolution might not only pr…

education.field_of_studyPopulation levelHabitatIndividual heterogeneityEcologyEcology (disciplines)Populationta1181Biological dispersalBiologyeducationEcology Evolution Behavior and SystematicsBirth rateOikos
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