{
 "record_id": "ba6d3043dcfb0e7c6ad45ae35c0629afbc728c5f",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "An ANN Model for the Influence of Siding Materials on Single-Family Home Values",
  "year": 2003,
  "doi": "10.18260/1-2--12549",
  "country": "United States",
  "region_city": "College Station, Texas",
  "sample_start": 1997,
  "sample_end": 2000,
  "property_type": "single_family",
  "price_type": "transaction",
  "data_source": "145 MLS confirmed sales of structurally homogeneous single-family homes, validated with Brazos County Appraisal District data",
  "document_type": "conference",
  "estimators": [
   "OLS"
  ],
  "spatial_method": "none",
  "time_fe": false,
  "location_fe": false,
  "se_type": "unknown",
  "n_obs_total": 145,
  "ai_methods": [
   "ANN (Jordan-Elman recurrent network) for price prediction, compared with hedonic OLS"
  ],
  "notes": "Hedonic equation printed in text only (p. 5): PPSQFT00 = 52.419 - 0.515*AGE_YR + 16.595*CONST_VENEER + 15.734*CONST_FRAME + 18.323*CONST_MIX + 37.642*CONST_STUCO; R2 = 0.622, F significant at 0.0001; no SEs, t-statistics or p-values printed for individual coefficients (text states the five inputs were statistically significant). Dependent variable: sale price per heated square foot adjusted to year-2000 dollars (level). Reference siding category not stated (all four siding dummies have coefficients; text compares stucco with brick veneer: +$21/sqft). ANN results are predictive only (no marginal effects) and not extracted."
 },
 "models": [
  {
   "model_id": "EQ1-c1",
   "table": "text equation p.5",
   "column": "1",
   "page": 5,
   "dep_var": "PPSQFT00: sale price per square foot adjusted to 2000 value (USD/sqft)",
   "dep_transform": "per_m2",
   "estimator": "OLS",
   "n_obs": 145,
   "r2": 0.622,
   "se_or_t_in_parentheses": "none",
   "sample_subset": "homogeneous single-family homes, 1997-2000",
   "notes": "per square foot (not per m2); coefficients only, no inference statistics printed"
  }
 ],
 "coefficients": [
  {
   "model_id": "EQ1-c1",
   "var_name_printed": "AGE_YR",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": -0.515,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 5,
   "confidence": "medium",
   "notes": "age of the building at sale in years; USD per sqft; no SE/t printed, text says variables were statistically significant"
  },
  {
   "model_id": "EQ1-c1",
   "var_name_printed": "CONST_VENEER",
   "taxonomy_id": "roof_materials",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 16.595,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 5,
   "confidence": "medium",
   "notes": "at least 85% of exterior is brick veneer; USD per sqft; no SE/t printed, text says variables were statistically significant"
  },
  {
   "model_id": "EQ1-c1",
   "var_name_printed": "CONST_FRAME",
   "taxonomy_id": "roof_materials",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 15.734,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 5,
   "confidence": "medium",
   "notes": "asbestos / T111 plywood siding; USD per sqft; no SE/t printed, text says variables were statistically significant"
  },
  {
   "model_id": "EQ1-c1",
   "var_name_printed": "CONST_MIX",
   "taxonomy_id": "roof_materials",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 18.323,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 5,
   "confidence": "medium",
   "notes": "combination of two siding materials; USD per sqft; no SE/t printed, text says variables were statistically significant"
  },
  {
   "model_id": "EQ1-c1",
   "var_name_printed": "CONST_STUCO",
   "taxonomy_id": "roof_materials",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 37.642,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 5,
   "confidence": "medium",
   "notes": "stucco-paint / sheet sidings; USD per sqft; no SE/t printed, text says variables were statistically significant"
  }
 ]
}