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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ancelet, Sophie Etienne, Marie Pierre Beît, Hugues Parent, Eric |
| Copyright Year | 2009 |
| Abstract | A parsimonious model is presented as an alternative to delta approaches to modelling zero-inflated continuous data. The data model relies on an exponentially compound Poisson process, also called the law of leaks (LOL). It represents the process of sampling resources that are spatially distributed as Poisson distributed patches, each containing a certain quantity of biomass drawn from an exponential distribution. In an application of the LOL, two latent structures are proposed to account for spatial dependencies between zero values at different scales within a hierarchical Bayesian framework. The LOL is compared to the delta-gamma (ΔΓ) distribution using bottom-trawl survey data. Results of this case study emphasize that the LOL provides slightly better fits to learning samples with a very high proportion of zero values and small strictly positive abundance data. Additionally, it offers better predictions of validation samples. |
| Starting Page | 347 |
| Ending Page | 376 |
| Page Count | 30 |
| File Format | |
| ISSN | 13528505 |
| Journal | Environmental and Ecological Statistics |
| Volume Number | 17 |
| Issue Number | 3 |
| e-ISSN | 15733009 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2009-04-03 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Bayes factor Bayesian hierarchical modelling Excess zeros Intrinsic AutoRegressive spatial model MCMC algorithms Posterior predictive loss criterion Evolutionary Biology Statistics Mathematical Biology in General Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Statistics and Probability Environmental Science Statistics, Probability and Uncertainty |
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