{"record_id": "ee4a73efc5ad67b4400db23b09eeacbeb4812f86", "eligible": true, "short_ref": "Kim, Choi & Lee (2025)", "country": "South Korea", "city": "Seoul (Gangnam District)", "property_type": "apartments (condominiums)", "price_type": "transaction price (ten-thousands KRW)", "n_obs": 15162, "sample_period": "2006-2017", "data_source": "Ministry of Land, Infrastructure and Transport (MOLIT) apartment transaction records", "methods_compared": ["multiple linear regression (OLS)", "decision tree", "random forest", "XGBoost", "CatBoost", "kNN"], "best_method": "random forest", "metric": "MAPE", "best_value": 5.928, "hedonic_value": 12.227, "test_set": "k-fold", "features_ai": "none", "incremental_ai_gain": null, "incremental_ai_metric": "", "marginal_effects": "SHAP", "notes": "5-fold CV (Section 5 and Appendix Table A1): random forest R2 0.970, MAPE 0.05928 (=5.928%), RMSE 8114.391, MAE 4044.365; multiple linear regression R2 0.892, MAPE 0.12227 (=12.227%), RMSE 20852.602, MAE 14353.423 (RMSE/MAE in ten-thousands KRW). 10-fold CV also reported (RF R2 0.972, MLR R2 0.799). SHAP (TreeSHAP) and permutation feature importance for both MLR and RF, plus temporal sub-period analysis; MLR coefficients also reported.", "confidence": "high"}