A two-stage 'Group-R2' Bayesian prior decomposes explained variance across and within predictor groups, improving shrinkage and predictive performance in distributed-signal settings.
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R2 priors for Grouped Variance Decomposition in High-dimensional Regression
A two-stage 'Group-R2' Bayesian prior decomposes explained variance across and within predictor groups, improving shrinkage and predictive performance in distributed-signal settings.