{
 "record_id": "37a309783a11809263623703621db3a26e46597f",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "The Effect of Central Business District on House Prices in Chengdu Metropolitan Area: A Hedonic Approach",
  "year": 2015,
  "doi": "10.2991/cas-15.2015.83",
  "country": "China",
  "region_city": "Chengdu (within the Around-the-city Expressway), Sichuan",
  "sample_start": 2014,
  "sample_end": 2014,
  "property_type": "condo_apartment",
  "price_type": "listing",
  "data_source": "Asking ('call') prices of 180 ordinary older second-hand units listed on Sohu/Sina real-estate websites; sampled mid-January to mid-April (year not printed; website references dated 2014)",
  "document_type": "conference",
  "estimators": [
   "OLS"
  ],
  "spatial_method": "none",
  "time_fe": false,
  "location_fe": false,
  "se_type": "unknown",
  "n_obs_total": 180,
  "ai_methods": [],
  "notes": "Log-log specification, all regressors in natural logs including ordinal variables. N = 180 units ('2160 observations' = 180 units x 12 variables). Sample year inferred from the dated website references (2014) — not printed explicitly. Price variable PRICE (mean 97.8, max 365) unit not stated (likely total asking price in 10,000 RMB). t-statistics and p-values in separate columns; no stars. Table II preliminary (11 regressors) and Table III stepwise (9 regressors); an 'Error term' row (AR/MA term) not extracted. White heteroskedasticity test significant; SEs presumably conventional."
 },
 "models": [
  {
   "model_id": "T2-c1",
   "table": "II",
   "column": "1",
   "page": 2,
   "dep_var": "ln(PRICE) (asking price)",
   "dep_transform": "log",
   "estimator": "OLS",
   "n_obs": 180,
   "r2": 0.72,
   "se_or_t_in_parentheses": "none",
   "sample_subset": "Preliminary regression with all 11 features; R2 0.72, adj 0.70"
  },
  {
   "model_id": "T3-c1",
   "table": "III",
   "column": "1",
   "page": 3,
   "dep_var": "ln(PRICE) (asking price)",
   "dep_transform": "log",
   "estimator": "OLS",
   "n_obs": 180,
   "r2": 0.72,
   "se_or_t_in_parentheses": "none",
   "sample_subset": "Stepwise regression (RING and HALL dropped); R2 0.72, adj 0.70"
  }
 ],
 "coefficients": [
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(AREA)",
   "taxonomy_id": "living_area",
   "x_transform": "log",
   "x_unit": "m2",
   "beta": 0.89,
   "se": null,
   "t": 8.35,
   "p": 0.0,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Floor space 50-200 m2"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(DECORATION)",
   "taxonomy_id": "condition",
   "x_transform": "log",
   "x_unit": "index",
   "beta": 0.04,
   "se": null,
   "t": 1.59,
   "p": 0.11,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Decoration grade 1-4 (ordinal), entered in log"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(BEDROOM)",
   "taxonomy_id": "bedrooms",
   "x_transform": "log",
   "x_unit": "count",
   "beta": 0.07,
   "se": null,
   "t": 0.89,
   "p": 0.37,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": ""
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(HALL)",
   "taxonomy_id": "other",
   "x_transform": "log",
   "x_unit": "count",
   "beta": 0.07,
   "se": null,
   "t": 0.8,
   "p": 0.42,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Number of halls (living/dining rooms)"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(BATHROOM)",
   "taxonomy_id": "bathrooms",
   "x_transform": "log",
   "x_unit": "count",
   "beta": 0.06,
   "se": null,
   "t": 1.1,
   "p": 0.27,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": ""
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(FLOORLEVEL)",
   "taxonomy_id": "floor_level",
   "x_transform": "log",
   "x_unit": "count",
   "beta": -0.01,
   "se": null,
   "t": -0.84,
   "p": 0.4,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": ""
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(YEAR)",
   "taxonomy_id": "age",
   "x_transform": "log",
   "x_unit": "years",
   "beta": -0.16,
   "se": null,
   "t": -5.22,
   "p": 0.0,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "YEAR = house age in years (mean 8.6), not year built"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(GREENCOVERAGE)",
   "taxonomy_id": "green_space",
   "x_transform": "log",
   "x_unit": "share",
   "beta": 0.05,
   "se": null,
   "t": 2.79,
   "p": 0.01,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Green coverage rate of the estate in percent"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(RING)",
   "taxonomy_id": "other",
   "x_transform": "log",
   "x_unit": "index",
   "beta": 0.01,
   "se": null,
   "t": 0.12,
   "p": 0.91,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Ring-road zone ordinal 1-4"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(DIST_CBD)",
   "taxonomy_id": "cbd_distance",
   "x_transform": "log",
   "x_unit": "m",
   "beta": -0.09,
   "se": null,
   "t": -2.04,
   "p": 0.04,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Distance to Yan Shi Kou CBD in metres"
  },
  {
   "model_id": "T2-c1",
   "var_name_printed": "LOG(UNDERGROUND)",
   "taxonomy_id": "transit_distance",
   "x_transform": "other",
   "x_unit": "index",
   "beta": -0.08,
   "se": null,
   "t": -1.9,
   "p": 0.06,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 2,
   "confidence": "high",
   "notes": "Log of ordinal walking-distance zone to nearest metro station (1 = <400 m ... 5 = >1600 m)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(AREA)",
   "taxonomy_id": "living_area",
   "x_transform": "log",
   "x_unit": "m2",
   "beta": 0.92,
   "se": null,
   "t": 9.06,
   "p": 0.0,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": "Floor space 50-200 m2"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(DECORATION)",
   "taxonomy_id": "condition",
   "x_transform": "log",
   "x_unit": "index",
   "beta": 0.05,
   "se": null,
   "t": 1.68,
   "p": 0.09,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": "Decoration grade 1-4 (ordinal), entered in log"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(BEDROOM)",
   "taxonomy_id": "bedrooms",
   "x_transform": "log",
   "x_unit": "count",
   "beta": 0.07,
   "se": null,
   "t": 0.94,
   "p": 0.35,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": ""
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(BATHROOM)",
   "taxonomy_id": "bathrooms",
   "x_transform": "log",
   "x_unit": "count",
   "beta": 0.06,
   "se": null,
   "t": 1.06,
   "p": 0.29,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": ""
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(FLOORLEVEL)",
   "taxonomy_id": "floor_level",
   "x_transform": "log",
   "x_unit": "count",
   "beta": -0.01,
   "se": null,
   "t": -0.84,
   "p": 0.4,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": ""
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(YEAR)",
   "taxonomy_id": "age",
   "x_transform": "log",
   "x_unit": "years",
   "beta": -0.17,
   "se": null,
   "t": -5.38,
   "p": 0.0,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": "YEAR = house age in years (mean 8.6), not year built"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(GREENCOVERAGE)",
   "taxonomy_id": "green_space",
   "x_transform": "log",
   "x_unit": "share",
   "beta": 0.05,
   "se": null,
   "t": 2.76,
   "p": 0.01,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": "Green coverage rate of the estate in percent"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(DIST_CBD)",
   "taxonomy_id": "cbd_distance",
   "x_transform": "log",
   "x_unit": "m",
   "beta": -0.09,
   "se": null,
   "t": -3.83,
   "p": 0.0,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": "Distance to Yan Shi Kou CBD in metres"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "LOG(UNDERGROUND)",
   "taxonomy_id": "transit_distance",
   "x_transform": "other",
   "x_unit": "index",
   "beta": -0.07,
   "se": null,
   "t": -1.85,
   "p": 0.07,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 3,
   "confidence": "high",
   "notes": "Log of ordinal walking-distance zone to nearest metro station (1 = <400 m ... 5 = >1600 m)"
  }
 ]
}