{
 "record_id": "2580ac3af513b0ee5f2e19ed10bd991f2a8c8015",
 "eligible": true,
 "short_ref": "Takizawa (2023)",
 "country": "Japan",
 "city": "Osaka Prefecture",
 "property_type": "family-oriented rental apartments (3LDK-type units)",
 "price_type": "monthly rent (excluding common expenses, Yen)",
 "n_obs": 15323,
 "sample_period": "2015 (LIFULL HOME'S snapshot, September 2015)",
 "data_source": "LIFULL HOME'S dataset (listings + floor-plan images)",
 "methods_compared": [
  "OLS hedonic (baseline, general attributes)",
  "OLS hedonic + graph features (GF model)",
  "OLS hedonic + GCN floor-plan value (FPV model)"
 ],
 "best_method": "OLS hedonic + GCN-derived floor plan value (FPV model)",
 "metric": "RMSE",
 "best_value": 11280,
 "hedonic_value": null,
 "test_set": "k-fold",
 "features_ai": "floor-plan",
 "incremental_ai_gain": null,
 "incremental_ai_metric": "",
 "marginal_effects": "coefficients",
 "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.",
 "confidence": "medium"
}