tier,mae,mae_ci_low,mae_ci_high,mape_pct,r2_log,n_test,cv_mae,cv_mae_ci_low,cv_mae_ci_high,cv_mape_pct,cv_r2_log
tier5_xgboost_optuna,29091.0,27095.0,31157.0,14.73,0.73,1226,30533.0,29409.0,31537.0,15.6159,0.7051
tier4_random_forest,35935.0,33906.0,38129.0,19.02,0.6151,1226,37016.0,35799.0,38046.0,19.3399,0.6099
tier3_ridge_full,43199.0,40907.0,45464.0,23.25,0.462,1226,42179.0,40951.0,43236.0,22.3104,0.5092
tier2_mincer_ols,51322.0,48366.0,54199.0,27.36,0.2827,1226,52041.0,50416.0,53389.0,27.5026,0.2866
tier1_stratified_mean,59589.0,56469.0,62505.0,32.89,0.0447,1226,61623.0,59939.0,63068.0,33.8121,0.025
tier0_constant,60509.0,57405.0,63536.0,33.65,-0.0001,1226,62279.0,60528.0,63759.0,34.2065,-0.0015