Double Hill climbing ( DHC) Two search procedures s One for model structure One for cardinalities of latent variables Very inefficient. Tested only on data sets with 7 or fewer variables (Zhang 2004) DHC tested on synthetic and real-world data sets, together with BIC AIC, and Holdout likelihood respectively Best models found when bic was used So subsequent work based on bIC AAAl2014 Tutorial Nevin L Zhang HKUSTAAAI 2014 Tutorial Nevin L. Zhang HKUST 9  Two search procedures  One for model structure  One for cardinalities of latent variables.  Very inefficient. Tested only on data sets with 7 or fewer variables. (Zhang 2004)  DHC tested on synthetic and real-world data sets, together with BIC, AIC, and Holdout likelihood respectively.  Best models found when BIC was used.  So subsequent work based on BIC. Double Hill Climbing (DHC)