{
 "record_id": "2580ac3af513b0ee5f2e19ed10bd991f2a8c8015",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "Extracting real estate values of rental apartment floor plans using graph convolutional networks",
  "year": null,
  "doi": "",
  "country": "Japan",
  "region_city": "Osaka Prefecture",
  "sample_start": 2015,
  "sample_end": 2015,
  "property_type": "rental",
  "price_type": "rent",
  "data_source": "Nationwide rental listing database (approx. 5.33 million rental properties as of September 2015) with floor-plan images; family-oriented rental apartments in Osaka Prefecture, N=15,323",
  "document_type": "working_paper",
  "estimators": [
   "OLS"
  ],
  "spatial_method": "",
  "time_fe": false,
  "location_fe": false,
  "se_type": "unknown",
  "n_obs_total": 15323,
  "ai_methods": [
   "graph convolutional network (ResGatedGraphConv) on floor-plan access graphs producing a floor-plan value (FPV)",
   "semantic segmentation of floor-plan images",
   "integrated gradients"
  ],
  "notes": "Preprint without metadata in dump header (author Atsushi Takizawa, Osaka Metropolitan University; year/DOI not printed). Tables 5 and 6 report, for each regressor, the MEAN +/- SD of the partial regression coefficient and of the p-value across 10 semi-cross-validation folds — the SD is fold-to-fold dispersion, NOT a standard error; recorded se=null, p=mean p, confidence medium. Dependent variable: monthly rent without common expenses (Yen), level. Table 6 is captioned 'FPV model' but contains the graph-feature (GF) model regressors. Rows with p printed '<0.000' have p=null and note. Listed rents (asking)."
 },
 "models": [
  {
   "model_id": "T5-FPV",
   "table": "5",
   "column": "FPV model (mean over 10 folds)",
   "page": 12,
   "dep_var": "Rent (Yen/month)",
   "dep_transform": "level",
   "estimator": "OLS",
   "n_obs": 15323,
   "r2": null,
   "se_or_t_in_parentheses": "none",
   "sample_subset": "baseline attributes + GCN floor-plan value; mean adj. R2 across folds 0.79 (Fig. 11)"
  },
  {
   "model_id": "T6-GF",
   "table": "6",
   "column": "Graph-feature (GF) model (mean over 10 folds)",
   "page": 13,
   "dep_var": "Rent (Yen/month)",
   "dep_transform": "level",
   "estimator": "OLS",
   "n_obs": 15323,
   "r2": null,
   "se_or_t_in_parentheses": "none",
   "sample_subset": "baseline attributes + explicit access-graph features"
  }
 ],
 "coefficients": [
  {
   "model_id": "T5-FPV",
   "var_name_printed": "LandPrice",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "currency",
   "beta": 0.138,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 0.005 (not an SE). p printed as <0.000. Average land price in zip-code area, Yen/m2"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "Area",
   "taxonomy_id": "living_area",
   "x_transform": "level",
   "x_unit": "m2",
   "beta": 1044,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 50.83 (not an SE). p printed as <0.000."
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "Year",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": 929.8,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 57.14 (not an SE). p printed as <0.000. Year of building completion (higher = newer)"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "FPV",
   "taxonomy_id": "multimodal_embedding",
   "x_transform": "level",
   "x_unit": "index",
   "beta": 599.0,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 90.81 (not an SE). p printed as <0.000. Floor-plan value learned by GCN from access graph of floor-plan image (deviation score, mean 50, SD 10)"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "L_Building",
   "taxonomy_id": "storeys",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 1073,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 236.5 (not an SE). p printed as <0.000. Number of building floors"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "Passenger",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 0.071,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 0.011 (not an SE). p printed as <0.000. Daily passengers at nearest station (2016)"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "L_Room",
   "taxonomy_id": "floor_level",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 838.3,
   "se": null,
   "t": null,
   "p": 0.001,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 368.1 (not an SE). p = mean across folds (SD 0.001). Floor of housing unit"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "Distance",
   "taxonomy_id": "transit_distance",
   "x_transform": "level",
   "x_unit": "m",
   "beta": -2.929,
   "se": null,
   "t": null,
   "p": 0.025,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 0.963 (not an SE). p = mean across folds (SD 0.08). Distance to nearest station/bus stop, metres"
  },
  {
   "model_id": "T5-FPV",
   "var_name_printed": "Structure_RC",
   "taxonomy_id": "roof_materials",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 3032,
   "se": null,
   "t": null,
   "p": 0.299,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 2746 (not an SE). p = mean across folds (SD 0.189). Reinforced-concrete structure"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Land price",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "currency",
   "beta": 0.141,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 0.007 (not an SE). p printed as <0.000. Average land price in zip-code area, Yen/m2"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Area",
   "taxonomy_id": "living_area",
   "x_transform": "level",
   "x_unit": "m2",
   "beta": 1098,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 86.27 (not an SE). p printed as <0.000."
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Year",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": 926.6,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 87.12 (not an SE). p printed as <0.000. Year of building completion (higher = newer)"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "F_Building",
   "taxonomy_id": "storeys",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 1299,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 329.8 (not an SE). p printed as <0.000. Number of building floors"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Passenger",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 0.072,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 0.013 (not an SE). p printed as <0.000. Daily passengers at nearest station"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Distance",
   "taxonomy_id": "transit_distance",
   "x_transform": "level",
   "x_unit": "m",
   "beta": -3.322,
   "se": null,
   "t": null,
   "p": 0.019,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 1.1 (not an SE). p = mean across folds (SD 0.061). Distance to nearest station/bus stop, metres"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "F_Dwelling",
   "taxonomy_id": "floor_level",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 808.1,
   "se": null,
   "t": null,
   "p": 0.058,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 471.1 (not an SE). p = mean across folds (SD 0.155). Floor of housing unit"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "RRA_jp",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "index",
   "beta": -3987,
   "se": null,
   "t": null,
   "p": 0.02,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 1469 (not an SE). p = mean across folds (SD 0.038). Access-graph feature: real relative asymmetry of Japanese room"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Num_cl",
   "taxonomy_id": "storage",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 1211,
   "se": null,
   "t": null,
   "p": 0.102,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 614.0 (not an SE). p = mean across folds (SD 0.224). Number of closets (graph nodes)"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Num_bl",
   "taxonomy_id": "terrace_balcony",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 1533,
   "se": null,
   "t": null,
   "p": 0.112,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 690.4 (not an SE). p = mean across folds (SD 0.168). Number of balconies (graph nodes)"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "RRA_wc",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "index",
   "beta": 4082,
   "se": null,
   "t": null,
   "p": 0.195,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 2343 (not an SE). p = mean across folds (SD 0.231). Access-graph feature: relative asymmetry of toilet"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Num_edge",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "count",
   "beta": -568.9,
   "se": null,
   "t": null,
   "p": 0.148,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 250.1 (not an SE). p = mean across folds (SD 0.187). Number of access-graph edges"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Depth_en",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 631.6,
   "se": null,
   "t": null,
   "p": 0.428,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 1077 (not an SE). p = mean across folds (SD 0.324). Depth of entrance in access graph"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "RRA_bt",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "index",
   "beta": -2354,
   "se": null,
   "t": null,
   "p": 0.45,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 3229 (not an SE). p = mean across folds (SD 0.333). Access-graph feature: relative asymmetry of bathroom"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "Structure_RC",
   "taxonomy_id": "roof_materials",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 2871,
   "se": null,
   "t": null,
   "p": 0.382,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 3362 (not an SE). p = mean across folds (SD 0.259). Reinforced-concrete structure"
  },
  {
   "model_id": "T6-GF",
   "var_name_printed": "H*",
   "taxonomy_id": "other",
   "x_transform": "level",
   "x_unit": "index",
   "beta": -5471,
   "se": null,
   "t": null,
   "p": 0.593,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 13,
   "confidence": "medium",
   "notes": "Mean of coefficients across 10 CV folds; SD across folds = 8045 (not an SE). p = mean across folds (SD 0.383). Access-graph integration/entropy measure"
  }
 ]
}