手法を比較

	ベイズモデル平均	Elastic Net
分野	ベイズ	機械学習
系統	Bayesian methods	Machine learning
提唱年	1999	2005
提唱者	Hoeting, Madigan, Raftery & Volinsky	Zou, H. & Hastie, T.
種類	Bayesian model averaging	Regularized linear regression (L1 + L2 penalty)
原典	Hoeting, J. A., Madigan, D., Raftery, A. E. & Volinsky, C. T. (1999). Bayesian Model Averaging: A Tutorial. Statistical Science, 14(4), 382–401.	Zou, H. & Hastie, T. (2005). Regularization and Variable Selection via the Elastic Net. Journal of the Royal Statistical Society: Series B, 67(2), 301–320.
別名	BMA, Bayesian model combination, Bayesian Model Ortalaması (BMA)	Elastic Net Regresyon, elastic net regression, ElasticNet, L1/L2 regularized regression
関連	5	4
概要	Bayesian Model Averaging (BMA), formalised as a tutorial by Hoeting, Madigan, Raftery and Volinsky in 1999, addresses model uncertainty by averaging over all plausible model specifications rather than selecting a single best model. Each candidate model receives a posterior probability that reflects how well it fits the data given a prior, and predictions or coefficient estimates are formed as weighted averages across the entire model space. This approach reduces the bias and overconfidence that arise when a single selected model is treated as the true one.	Elastic Net is a regularized linear regression method introduced by Zou and Hastie in 2005 that blends the LASSO (L1) and Ridge (L2) penalties, so it performs variable selection and coefficient shrinkage at the same time. It is designed for predictive and explanatory modelling on data with many, possibly correlated, predictors.