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Are you ready to go fishing in the data lake?

While Andrew is trying to get someone to make a t-shirt design “Gone fishing”, someone else thinks fishing is one of the “big data trends in 2015”. This advertisement by some company keeps re-appearing in my twitter feed.

Comparison of Bayesian predictive methods for model selection

This post is by Aki We mention the problem of bias induced by model selection in A survey of Bayesian predictive methods for model assessment, selection and comparison, in Understanding predictive information criteria for Bayesian models, and in BDA3 Chapter 7, but we haven’t had a good answer how to avoid that problem (except by […]

Cross-validation, LOO and WAIC for time series

This post is by Aki. Jonah asked in Stan users mailing list Suppose we have J groups and T time periods, so y[t,j] is the observed value of y at time t for group j. (We also have predictors x[t,j].) I’m wondering if WAIC is appropriate in this scenario assuming that our interest in predictive accuracy is for […]

Students don’t know what’s best for their own learning

[This post is by Aki] This is my first blog posting. Arthur Poropat at Griffith University has a great posting Students don’t know what’s best for their own learning about two recent studies which came to the same conclusion: university students evaluate their teachers more positively when they learn less. My favorite part is That is why many […]