ites="VehtariEtAl:2017">Vehtari, Gelman, and Gabry (<a href="#ref-VehtariEtAl:2017" role="doc-biblioref">2017</a>)</span> introduce a method that approximates the evaluation of leave-one-out cross validation inexpensively using only the data point log likelihoods from a single model fit. This method is documented and implemented in the R package loo <span class="citation" data-cites="GabryEtAl:2019">(<a href="#ref-GabryEtAl:2019" role="doc-biblioref">Gabry et al. 2019</a>)</span>.</p>



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