Comment: Consensus Monte Carlo using expectation propagation

The article under discussion considers algorithms for performing inference on large or unwieldy datasets by partitioning the data, analyzing each piece separately, and then putting the inferences together. This is an active area of research in computational statistics (see, for example, Tresp, 2000, Ahn, Korattikara and Welling, 2012, Gershman, Hoffman and Blei, 2012, Hoffman et al., 2013, Wang and Blei, 2013, Scott et al., 2013, Wang and Dunson, 2013, andNeiswanger, Wang and Xing, 2013).