1{2 "record_id": "2580ac3af513b0ee5f2e19ed10bd991f2a8c8015",3 "eligible": true,4 "short_ref": "Takizawa (2023)",5 "country": "Japan",6 "city": "Osaka Prefecture",7 "property_type": "family-oriented rental apartments (3LDK-type units)",8 "price_type": "monthly rent (excluding common expenses, Yen)",9 "n_obs": 15323,10 "sample_period": "2015 (LIFULL HOME'S snapshot, September 2015)",11 "data_source": "LIFULL HOME'S dataset (listings + floor-plan images)",12 "methods_compared": [13 "OLS hedonic (baseline, general attributes)",14 "OLS hedonic + graph features (GF model)",15 "OLS hedonic + GCN floor-plan value (FPV model)"16 ],17 "best_method": "OLS hedonic + GCN-derived floor plan value (FPV model)",18 "metric": "RMSE",19 "best_value": 11280,20 "hedonic_value": null,21 "test_set": "k-fold",22 "features_ai": "floor-plan",23 "incremental_ai_gain": null,24 "incremental_ai_metric": "",25 "marginal_effects": "coefficients",26 "notes": "10-fold 'semi-cross-validation' on test folds: FPV model mean RMSE 11,280 Yen and mean adjusted R2 0.79, reported as significantly better (Bonferroni) than the baseline hedonic model and the graph-feature model; baseline model RMSE/R2 shown only in Figure 11 boxplots, not printed as numbers, so hedonic_value and the incremental gain are left null. Floor-plan value is a GCN embedding of the access graph extracted from floor-plan images and entered as one regressor. Regression coefficients of the FPV model (Tables 5-6) and integrated-gradient analysis of the GCN are reported.",27 "confidence": "medium"28}