1{"record_id": "0726a6cc581fee39cc268e4d32d8292b296bebc9", "eligible": true, "short_ref": "Dewi, Ulama & Susilaningrum (2024)", "country": "Indonesia", "city": "Surabaya", "property_type": "single-family residential houses", "price_type": "asking/selling price from property advertisements, re-verified with sellers (million IDR)", "n_obs": 548, "sample_period": "July-September 2023 (properties transacted or offered in the past year)", "data_source": "property advertisement websites, re-verified with sellers (purposive sample, >=5 houses per sub-district)", "methods_compared": ["OLS hedonic (multiple regression analysis)", "artificial neural network (backpropagation)"], "best_method": "artificial neural network", "metric": "MAPE", "best_value": 31.04, "hedonic_value": 34.24, "test_set": "holdout", "features_ai": "none", "incremental_ai_gain": null, "incremental_ai_metric": "", "marginal_effects": "coefficients", "notes": "Table 4, 20% holdout test data (80:20 split, same partition for both models): ANN MAE 2.98 x 10^2, RMSE 3.70 x 10^2, MAPE 31.04%; MRA MAE 3.28 x 10^2, RMSE 3.96 x 10^2, MAPE 34.24% (MAE/RMSE presumably in million IDR; mean price 1.935 billion IDR). Hedonic regression coefficients reported in Table 3 (adj. R2 0.91 on training data). Authors note ANN errors remain high, model only to support appraisers.", "confidence": "medium"}2