Assessment of estimator performance by posterior predictive expected squared error for the non-paired tomato data sets. Total posterior predictive squared error relative to that of the gold standard model (the local-FDR mean expression estimator calculated using t-statistics and the theoretical null, labeled "t stat. with locfdr" in the figure) for 0 days vs. 3 days, 0 days vs. 10 days, and 3 days vs. 10 days tomato data sets. Error definitions are the same as those of Figure 2. Algorithm definitions are the same as those of Figure 1.