{"record_id": "3d555b719dcd66f5b773ee480ecb47ce9229f3fe", "eligible": true, "short_ref": "Štubňová, Urbaníková, Hudáková & Papcunová (2020)", "country": "Slovakia", "city": "Nitra", "property_type": "apartments", "price_type": "asking price (online listings)", "n_obs": 256,
 "sample_period": "2019-09 (listings collected 9-13 Sept 2019)", "data_source": "TopReality.sk online real estate portal", "methods_compared": ["OLS hedonic (stepwise backward)", "ANN (Levenberg-Marquardt)", "ANN (Bayesian regularization)", "ANN (scaled conjugate gradient)"],
 "best_method": "ANN (Bayesian regularization, 2 hidden layers 10/20 neurons)", "metric": "MAPE", "best_value": 3.39, "hedonic_value": 8.41,
 "test_set": "holdout", "features_ai": "none",
 "incremental_ai_gain": null, "incremental_ai_metric": "", "marginal_effects": "coefficients", "notes": "60 ANNs (Table 4) vs stepwise regression (Table 6). Best BR-ANN: R2 0.9749, MAE 3561.288, MAPE 3.39%; regression: R2 0.7898, RMSE 11454.91 EUR, MAE 8516.60, MAPE 8.41%. Data split 85:15 train/test (70:15:15 for LM/SCG ANNs); the text does not state explicitly whether the printed indices are computed on the test set alone, hence medium confidence. Regression coefficients reported; no ANN interpretation.", "confidence": "medium"}