{
 "record_id": "0a56ff9c5aeeb80c811f28d082785dd37d837fcc",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "Determining the Property Value Impact of Landfills",
  "year": 1993,
  "doi": "10.15760/etd.6640",
  "country": "United States",
  "region_city": "Portland, Oregon (neighbourhood within ~0.5 mile of the Lavele limited-purpose landfill)",
  "sample_start": 1971,
  "sample_end": 1986,
  "property_type": "single_family",
  "price_type": "transaction",
  "data_source": "Oregon Multiple Listing Service sales volumes for 1971, 1979 and 1986; Multnomah County Tax Assessor files; distances computed by the author",
  "document_type": "thesis",
  "estimators": [
   "OLS"
  ],
  "spatial_method": "none",
  "time_fe": false,
  "location_fe": false,
  "se_type": "OLS",
  "n_obs_total": 211,
  "ai_methods": [],
  "notes": "PhD dissertation (Portland State University, defended 1993; PDXScholar record dated 2000 in metadata). Table XI (p. 98 of PDF, printed p. 87): three separate linear (level) regressions for homes sold before the landfill opened (1971), during operation (1979) and after closure (1986); dependent variable = sale price adjusted to 1972 constant dollars; t-values in parentheses; no stars. Distance variable: straight-line distance from the landfill, measured in 240-ft city 'blocks' (equation p. 77 says 'in blocks'; p. 80 says feet grouped into 240-ft blocks); coefficient magnitude (200-676 per unit) consistent with blocks. No fireplace in homes sold in 1971 (variable omitted). Age coefficient for 1979 printed with OCR spacing ('-2 8 1 .8 3 4 3') read as -281.8343."
 },
 "models": [
  {
   "model_id": "TXI-c1",
   "table": "XI",
   "column": "1",
   "page": 98,
   "dep_var": "sale price of home, 1972 constant dollars (USD)",
   "dep_transform": "level",
   "estimator": "OLS",
   "n_obs": 56,
   "r2": 0.8779,
   "se_or_t_in_parentheses": "t",
   "sample_subset": "Homes sold in 1971 (Before) the Lavele landfill operation, within about 0.5 mile of the site"
  },
  {
   "model_id": "TXI-c2",
   "table": "XI",
   "column": "2",
   "page": 98,
   "dep_var": "sale price of home, 1972 constant dollars (USD)",
   "dep_transform": "level",
   "estimator": "OLS",
   "n_obs": 79,
   "r2": 0.7281,
   "se_or_t_in_parentheses": "t",
   "sample_subset": "Homes sold in 1979 (During) the Lavele landfill operation, within about 0.5 mile of the site"
  },
  {
   "model_id": "TXI-c3",
   "table": "XI",
   "column": "3",
   "page": 98,
   "dep_var": "sale price of home, 1972 constant dollars (USD)",
   "dep_transform": "level",
   "estimator": "OLS",
   "n_obs": 76,
   "r2": 0.764,
   "se_or_t_in_parentheses": "t",
   "sample_subset": "Homes sold in 1986 (After) the Lavele landfill operation, within about 0.5 mile of the site"
  }
 ],
 "coefficients": [
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Distance",
   "taxonomy_id": "hazard_site",
   "x_transform": "level",
   "x_unit": "other",
   "beta": 200.2874,
   "se": null,
   "t": 0.871,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "medium",
   "notes": "Straight-line distance from the landfill in 240-ft city blocks (unit ambiguous: 'blocks' in equation, 'feet' grouped into 240-ft blocks in variable definitions); positive = price rises away from landfill"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Lot Size",
   "taxonomy_id": "lot_size",
   "x_transform": "level",
   "x_unit": "sqft",
   "beta": 0.5924,
   "se": null,
   "t": 1.654,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Lot size in square feet"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "House Size",
   "taxonomy_id": "living_area",
   "x_transform": "level",
   "x_unit": "sqft",
   "beta": 5.906,
   "se": null,
   "t": 2.783,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Interior space in square feet"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Age",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": -136.873,
   "se": null,
   "t": -3.317,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Age of house at sale, years"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Bedroom",
   "taxonomy_id": "bedrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 888.9424,
   "se": null,
   "t": 1.145,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Number of bedrooms"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Bathroom",
   "taxonomy_id": "bathrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 7131.2993,
   "se": null,
   "t": 5.226,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Number of bathrooms"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Height",
   "taxonomy_id": "storeys",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 8029.9949,
   "se": null,
   "t": 0.991,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Height of house in stories"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Basement",
   "taxonomy_id": "basement",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 164.1152,
   "se": null,
   "t": 0.137,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Basement dummy"
  },
  {
   "model_id": "TXI-c1",
   "var_name_printed": "Garage",
   "taxonomy_id": "garage",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 1179.4304,
   "se": null,
   "t": 1.272,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Garage dummy"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Distance",
   "taxonomy_id": "hazard_site",
   "x_transform": "level",
   "x_unit": "other",
   "beta": 675.8605,
   "se": null,
   "t": 2.323,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "medium",
   "notes": "Straight-line distance from the landfill in 240-ft city blocks (unit ambiguous: 'blocks' in equation, 'feet' grouped into 240-ft blocks in variable definitions); positive = price rises away from landfill"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Lot Size",
   "taxonomy_id": "lot_size",
   "x_transform": "level",
   "x_unit": "sqft",
   "beta": 0.8929,
   "se": null,
   "t": 1.814,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Lot size in square feet"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "House Size",
   "taxonomy_id": "living_area",
   "x_transform": "level",
   "x_unit": "sqft",
   "beta": 14.6419,
   "se": null,
   "t": 3.709,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Interior space in square feet"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Age",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": -281.8343,
   "se": null,
   "t": -5.134,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "medium",
   "notes": "Age of house at sale, years; value read through OCR spacing"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Bedroom",
   "taxonomy_id": "bedrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": -2906.6269,
   "se": null,
   "t": -2.071,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Number of bedrooms"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Bathroom",
   "taxonomy_id": "bathrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 3454.0527,
   "se": null,
   "t": 1.541,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Number of bathrooms"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Height",
   "taxonomy_id": "storeys",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 12426,
   "se": null,
   "t": 2.01,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Height of house in stories"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Basement",
   "taxonomy_id": "basement",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 4770.998,
   "se": null,
   "t": 2.616,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Basement dummy"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Fireplace",
   "taxonomy_id": "fireplace",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 1091.5975,
   "se": null,
   "t": 0.561,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Fireplace dummy (no fireplaces among 1971 sales)"
  },
  {
   "model_id": "TXI-c2",
   "var_name_printed": "Garage",
   "taxonomy_id": "garage",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 2484.6345,
   "se": null,
   "t": 1.224,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Garage dummy"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Distance",
   "taxonomy_id": "hazard_site",
   "x_transform": "level",
   "x_unit": "other",
   "beta": -165.0572,
   "se": null,
   "t": -0.606,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "medium",
   "notes": "Straight-line distance from the landfill in 240-ft city blocks (unit ambiguous: 'blocks' in equation, 'feet' grouped into 240-ft blocks in variable definitions); positive = price rises away from landfill"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Lot Size",
   "taxonomy_id": "lot_size",
   "x_transform": "level",
   "x_unit": "sqft",
   "beta": 0.2752,
   "se": null,
   "t": 0.572,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Lot size in square feet"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "House Size",
   "taxonomy_id": "living_area",
   "x_transform": "level",
   "x_unit": "sqft",
   "beta": 16.2432,
   "se": null,
   "t": 4.04,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Interior space in square feet"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Age",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": -150.0718,
   "se": null,
   "t": -3.298,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Age of house at sale, years"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Bedroom",
   "taxonomy_id": "bedrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 620.9696,
   "se": null,
   "t": 0.495,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Number of bedrooms"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Bathroom",
   "taxonomy_id": "bathrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 4395.0062,
   "se": null,
   "t": 2.262,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Number of bathrooms"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Height",
   "taxonomy_id": "storeys",
   "x_transform": "level",
   "x_unit": "count",
   "beta": -5098.5247,
   "se": null,
   "t": -0.752,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Height of house in stories"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Basement",
   "taxonomy_id": "basement",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 4885.4162,
   "se": null,
   "t": 3.05,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Basement dummy"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Fireplace",
   "taxonomy_id": "fireplace",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 1053.9359,
   "se": null,
   "t": 0.597,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Fireplace dummy (no fireplaces among 1971 sales)"
  },
  {
   "model_id": "TXI-c3",
   "var_name_printed": "Garage",
   "taxonomy_id": "garage",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 7811.6183,
   "se": null,
   "t": 4.205,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 98,
   "confidence": "high",
   "notes": "Garage dummy"
  }
 ]
}