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OpenBUGS is software for running Markov Chain Monte Carlo (MCMC) simulations following Bayesian statistical theory. It is one of two software packages created for Bayesian Inference Using Gibbs Sampling, or BUGS. OpenBUGS is so named because it runs on multiple operating systems; the WinBUGS software can be used with Windows operating systems (see WinBUGS tool in the DataONEpedia for details).

Bayesian inference is built on specified probabilities of models and evaluated using MCMC simulation including error components. OpenBUGS implements these simulations and "samples" them according to user-defined criteria. OpenBUGS can be used as a stand-alone application but can also be integrated with R statistical software.

OpenBUGS requires thorough knowledge of Bayesian statistics to create and evaluate models appropriately.

Technical Expertise Required: 
Windows, Linux, Macintosh