Christopher Jackson

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This long-awaited text by the developers of BUGS, the most widely used software for Bayesian data analysis, provides a thorough description of BUGS and how to use it for Bayesian modeling. The first four chapters provide a introduction to Bayesian inference, the BUGS language, and the ideas behind Markov chain Monte Carlo (MCMC) methods. After this(More)
In typical small-area studies of health and environment we wish to make inference on the relationship between individual-level quantities using aggregate, or ecological, data. Such ecological inference is often subject to bias and imprecision, due to the lack of individual-level information in the data. Conversely, individual-level survey data often have(More)
Simulation study One aim of this study is to assess the extent of contextual, or area-level, socio-demographic effects on cardiovascular hospitalisation. It is not generally possible to distinguish between a contextual and underlying individual effect if only the area-level mean of the aggregate covariate is available. However, our data are more detailed.(More)
Behavioural ecology is rife with examples of prey animals that are able to adjust the intensity of their anti-predator response to match background risk levels. Often, preys need experience with predators before they will invest in costly anti-predator responses. This means that prey animals often fail to respond to predators during their first encounter.(More)
The multi-state Markov model is a useful way of describing a process in which an individual moves through a series of states in continuous time. The msm package for R allows a general multi-state model to be fitted to longitudinal data. Data often consist of observations of the process at arbitrary times, so that the exact times when the state changes are(More)
OBJECTIVE Previous studies have evaluated the cervical range of axial rotation during simulated driving conditions. The goals of this pilot study were to describe cervical spine rotation during in-car driving and determine the percentage of time outside neutral neck rotation and peak cervical axial rotation angles that the subjects adopted during various(More)
Recent studies have documented that exposure to high levels of background risk can induce neophobic predator avoidance in prey animals, whereby they respond to any novel cue with an anti-predator response. Such phenotypically plastic predator avoidance may allow prey to maximize anti-predator benefits in variable risk environments. It remains poorly(More)
Northern Australia supports the world’s largest estate of undeveloped tropical savannas, but previous studies of ant diversity in the region have covered only a fraction of its land area and habitat diversity. We assess patterns of ant species and functional diversity, their environmental predictors, and biogeographic significance in the central North(More)