This complicates model development because if two model variants perform differently empirically, it is uncertain whether it is because of a truly better model or merely better fit with the utilized parameter estimation method, as discussed also by Goldwater (2006, Section 4.2.2.3).
in contrast, within the adaptor grammar framework (Johnson, Griffiths, and Goldwater 2006;Sirts and Goldwater 2013), the focus has not been on finding a single best model, but rather on finding the posterior distribution over segmentations of the words.