Nowcast performance for elastic net models of α = 0.0, 0.1, …, 1.0.

The correlation is the average correlation over all 55 region/season pairs, while the min and max correlations are the min and max correlations over all region/season pairs. Similarly for the RMSE. The average number of estimated non-zero features are shown in the “Features” column. Ridge regression is qualitatively worse than all other α > 0 models. There is little difference between all α ≥ 0.1 models with respect to correlation and RMSE. The number of non-zero features tends to decline as an increasing function of α.