1{2 "record_id": "0a56ff9c5aeeb80c811f28d082785dd37d837fcc",3 "eligible": true,4 "exclusion_reason": null,5 "study": {6 "title": "Determining the Property Value Impact of Landfills",7 "year": 1993,8 "doi": "10.15760/etd.6640",9 "country": "United States",10 "region_city": "Portland, Oregon (neighbourhood within ~0.5 mile of the Lavele limited-purpose landfill)",11 "sample_start": 1971,12 "sample_end": 1986,13 "property_type": "single_family",14 "price_type": "transaction",15 "data_source": "Oregon Multiple Listing Service sales volumes for 1971, 1979 and 1986; Multnomah County Tax Assessor files; distances computed by the author",16 "document_type": "thesis",17 "estimators": [18 "OLS"19 ],20 "spatial_method": "none",21 "time_fe": false,22 "location_fe": false,23 "se_type": "OLS",24 "n_obs_total": 211,25 "ai_methods": [],26 "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."27 },28 "models": [29 {30 "model_id": "TXI-c1",31 "table": "XI",32 "column": "1",33 "page": 98,34 "dep_var": "sale price of home, 1972 constant dollars (USD)",35 "dep_transform": "level",36 "estimator": "OLS",37 "n_obs": 56,38 "r2": 0.8779,39 "se_or_t_in_parentheses": "t",40 "sample_subset": "Homes sold in 1971 (Before) the Lavele landfill operation, within about 0.5 mile of the site"41 },42 {43 "model_id": "TXI-c2",44 "table": "XI",45 "column": "2",46 "page": 98,47 "dep_var": "sale price of home, 1972 constant dollars (USD)",48 "dep_transform": "level",49 "estimator": "OLS",50 "n_obs": 79,51 "r2": 0.7281,52 "se_or_t_in_parentheses": "t",53 "sample_subset": "Homes sold in 1979 (During) the Lavele landfill operation, within about 0.5 mile of the site"54 },55 {56 "model_id": "TXI-c3",57 "table": "XI",58 "column": "3",59 "page": 98,60 "dep_var": "sale price of home, 1972 constant dollars (USD)",61 "dep_transform": "level",62 "estimator": "OLS",63 "n_obs": 76,64 "r2": 0.764,65 "se_or_t_in_parentheses": "t",66 "sample_subset": "Homes sold in 1986 (After) the Lavele landfill operation, within about 0.5 mile of the site"67 }68 ],69 "coefficients": [70 {71 "model_id": "TXI-c1",72 "var_name_printed": "Distance",73 "taxonomy_id": "hazard_site",74 "x_transform": "level",75 "x_unit": "other",76 "beta": 200.2874,77 "se": null,78 "t": 0.871,79 "p": null,80 "p_stars": "",81 "ci_lo": null,82 "ci_hi": null,83 "page": 98,84 "confidence": "medium",85 "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"86 },87 {88 "model_id": "TXI-c1",89 "var_name_printed": "Lot Size",90 "taxonomy_id": "lot_size",91 "x_transform": "level",92 "x_unit": "sqft",93 "beta": 0.5924,94 "se": null,95 "t": 1.654,96 "p": null,97 "p_stars": "",98 "ci_lo": null,99 "ci_hi": null,100 "page": 98,101 "confidence": "high",102 "notes": "Lot size in square feet"103 },104 {105 "model_id": "TXI-c1",106 "var_name_printed": "House Size",107 "taxonomy_id": "living_area",108 "x_transform": "level",109 "x_unit": "sqft",110 "beta": 5.906,111 "se": null,112 "t": 2.783,113 "p": null,114 "p_stars": "",115 "ci_lo": null,116 "ci_hi": null,117 "page": 98,118 "confidence": "high",119 "notes": "Interior space in square feet"120 },121 {122 "model_id": "TXI-c1",123 "var_name_printed": "Age",124 "taxonomy_id": "age",125 "x_transform": "level",126 "x_unit": "years",127 "beta": -136.873,128 "se": null,129 "t": -3.317,130 "p": null,131 "p_stars": "",132 "ci_lo": null,133 "ci_hi": null,134 "page": 98,135 "confidence": "high",136 "notes": "Age of house at sale, years"137 },138 {139 "model_id": "TXI-c1",140 "var_name_printed": "Bedroom",141 "taxonomy_id": "bedrooms",142 "x_transform": "level",143 "x_unit": "count",144 "beta": 888.9424,145 "se": null,146 "t": 1.145,147 "p": null,148 "p_stars": "",149 "ci_lo": null,150 "ci_hi": null,151 "page": 98,152 "confidence": "high",153 "notes": "Number of bedrooms"154 },155 {156 "model_id": "TXI-c1",157 "var_name_printed": "Bathroom",158 "taxonomy_id": "bathrooms",159 "x_transform": "level",160 "x_unit": "count",161 "beta": 7131.2993,162 "se": null,163 "t": 5.226,164 "p": null,165 "p_stars": "",166 "ci_lo": null,167 "ci_hi": null,168 "page": 98,169 "confidence": "high",170 "notes": "Number of bathrooms"171 },172 {173 "model_id": "TXI-c1",174 "var_name_printed": "Height",175 "taxonomy_id": "storeys",176 "x_transform": "level",177 "x_unit": "count",178 "beta": 8029.9949,179 "se": null,180 "t": 0.991,181 "p": null,182 "p_stars": "",183 "ci_lo": null,184 "ci_hi": null,185 "page": 98,186 "confidence": "high",187 "notes": "Height of house in stories"188 },189 {190 "model_id": "TXI-c1",191 "var_name_printed": "Basement",192 "taxonomy_id": "basement",193 "x_transform": "binary",194 "x_unit": "binary",195 "beta": 164.1152,196 "se": null,197 "t": 0.137,198 "p": null,199 "p_stars": "",200 "ci_lo": null,201 "ci_hi": null,202 "page": 98,203 "confidence": "high",204 "notes": "Basement dummy"205 },206 {207 "model_id": "TXI-c1",208 "var_name_printed": "Garage",209 "taxonomy_id": "garage",210 "x_transform": "binary",211 "x_unit": "binary",212 "beta": 1179.4304,213 "se": null,214 "t": 1.272,215 "p": null,216 "p_stars": "",217 "ci_lo": null,218 "ci_hi": null,219 "page": 98,220 "confidence": "high",221 "notes": "Garage dummy"222 },223 {224 "model_id": "TXI-c2",225 "var_name_printed": "Distance",226 "taxonomy_id": "hazard_site",227 "x_transform": "level",228 "x_unit": "other",229 "beta": 675.8605,230 "se": null,231 "t": 2.323,232 "p": null,233 "p_stars": "",234 "ci_lo": null,235 "ci_hi": null,236 "page": 98,237 "confidence": "medium",238 "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"239 },240 {241 "model_id": "TXI-c2",242 "var_name_printed": "Lot Size",243 "taxonomy_id": "lot_size",244 "x_transform": "level",245 "x_unit": "sqft",246 "beta": 0.8929,247 "se": null,248 "t": 1.814,249 "p": null,250 "p_stars": "",251 "ci_lo": null,252 "ci_hi": null,253 "page": 98,254 "confidence": "high",255 "notes": "Lot size in square feet"256 },257 {258 "model_id": "TXI-c2",259 "var_name_printed": "House Size",260 "taxonomy_id": "living_area",261 "x_transform": "level",262 "x_unit": "sqft",263 "beta": 14.6419,264 "se": null,265 "t": 3.709,266 "p": null,267 "p_stars": "",268 "ci_lo": null,269 "ci_hi": null,270 "page": 98,271 "confidence": "high",272 "notes": "Interior space in square feet"273 },274 {275 "model_id": "TXI-c2",276 "var_name_printed": "Age",277 "taxonomy_id": "age",278 "x_transform": "level",279 "x_unit": "years",280 "beta": -281.8343,281 "se": null,282 "t": -5.134,283 "p": null,284 "p_stars": "",285 "ci_lo": null,286 "ci_hi": null,287 "page": 98,288 "confidence": "medium",289 "notes": "Age of house at sale, years; value read through OCR spacing"290 },291 {292 "model_id": "TXI-c2",293 "var_name_printed": "Bedroom",294 "taxonomy_id": "bedrooms",295 "x_transform": "level",296 "x_unit": "count",297 "beta": -2906.6269,298 "se": null,299 "t": -2.071,300 "p": null,301 "p_stars": "",302 "ci_lo": null,303 "ci_hi": null,304 "page": 98,305 "confidence": "high",306 "notes": "Number of bedrooms"307 },308 {309 "model_id": "TXI-c2",310 "var_name_printed": "Bathroom",311 "taxonomy_id": "bathrooms",312 "x_transform": "level",313 "x_unit": "count",314 "beta": 3454.0527,315 "se": null,316 "t": 1.541,317 "p": null,318 "p_stars": "",319 "ci_lo": null,320 "ci_hi": null,321 "page": 98,322 "confidence": "high",323 "notes": "Number of bathrooms"324 },325 {326 "model_id": "TXI-c2",327 "var_name_printed": "Height",328 "taxonomy_id": "storeys",329 "x_transform": "level",330 "x_unit": "count",331 "beta": 12426,332 "se": null,333 "t": 2.01,334 "p": null,335 "p_stars": "",336 "ci_lo": null,337 "ci_hi": null,338 "page": 98,339 "confidence": "high",340 "notes": "Height of house in stories"341 },342 {343 "model_id": "TXI-c2",344 "var_name_printed": "Basement",345 "taxonomy_id": "basement",346 "x_transform": "binary",347 "x_unit": "binary",348 "beta": 4770.998,349 "se": null,350 "t": 2.616,351 "p": null,352 "p_stars": "",353 "ci_lo": null,354 "ci_hi": null,355 "page": 98,356 "confidence": "high",357 "notes": "Basement dummy"358 },359 {360 "model_id": "TXI-c2",361 "var_name_printed": "Fireplace",362 "taxonomy_id": "fireplace",363 "x_transform": "binary",364 "x_unit": "binary",365 "beta": 1091.5975,366 "se": null,367 "t": 0.561,368 "p": null,369 "p_stars": "",370 "ci_lo": null,371 "ci_hi": null,372 "page": 98,373 "confidence": "high",374 "notes": "Fireplace dummy (no fireplaces among 1971 sales)"375 },376 {377 "model_id": "TXI-c2",378 "var_name_printed": "Garage",379 "taxonomy_id": "garage",380 "x_transform": "binary",381 "x_unit": "binary",382 "beta": 2484.6345,383 "se": null,384 "t": 1.224,385 "p": null,386 "p_stars": "",387 "ci_lo": null,388 "ci_hi": null,389 "page": 98,390 "confidence": "high",391 "notes": "Garage dummy"392 },393 {394 "model_id": "TXI-c3",395 "var_name_printed": "Distance",396 "taxonomy_id": "hazard_site",397 "x_transform": "level",398 "x_unit": "other",399 "beta": -165.0572,400 "se": null,401 "t": -0.606,402 "p": null,403 "p_stars": "",404 "ci_lo": null,405 "ci_hi": null,406 "page": 98,407 "confidence": "medium",408 "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"409 },410 {411 "model_id": "TXI-c3",412 "var_name_printed": "Lot Size",413 "taxonomy_id": "lot_size",414 "x_transform": "level",415 "x_unit": "sqft",416 "beta": 0.2752,417 "se": null,418 "t": 0.572,419 "p": null,420 "p_stars": "",421 "ci_lo": null,422 "ci_hi": null,423 "page": 98,424 "confidence": "high",425 "notes": "Lot size in square feet"426 },427 {428 "model_id": "TXI-c3",429 "var_name_printed": "House Size",430 "taxonomy_id": "living_area",431 "x_transform": "level",432 "x_unit": "sqft",433 "beta": 16.2432,434 "se": null,435 "t": 4.04,436 "p": null,437 "p_stars": "",438 "ci_lo": null,439 "ci_hi": null,440 "page": 98,441 "confidence": "high",442 "notes": "Interior space in square feet"443 },444 {445 "model_id": "TXI-c3",446 "var_name_printed": "Age",447 "taxonomy_id": "age",448 "x_transform": "level",449 "x_unit": "years",450 "beta": -150.0718,451 "se": null,452 "t": -3.298,453 "p": null,454 "p_stars": "",455 "ci_lo": null,456 "ci_hi": null,457 "page": 98,458 "confidence": "high",459 "notes": "Age of house at sale, years"460 },461 {462 "model_id": "TXI-c3",463 "var_name_printed": "Bedroom",464 "taxonomy_id": "bedrooms",465 "x_transform": "level",466 "x_unit": "count",467 "beta": 620.9696,468 "se": null,469 "t": 0.495,470 "p": null,471 "p_stars": "",472 "ci_lo": null,473 "ci_hi": null,474 "page": 98,475 "confidence": "high",476 "notes": "Number of bedrooms"477 },478 {479 "model_id": "TXI-c3",480 "var_name_printed": "Bathroom",481 "taxonomy_id": "bathrooms",482 "x_transform": "level",483 "x_unit": "count",484 "beta": 4395.0062,485 "se": null,486 "t": 2.262,487 "p": null,488 "p_stars": "",489 "ci_lo": null,490 "ci_hi": null,491 "page": 98,492 "confidence": "high",493 "notes": "Number of bathrooms"494 },495 {496 "model_id": "TXI-c3",497 "var_name_printed": "Height",498 "taxonomy_id": "storeys",499 "x_transform": "level",500 "x_unit": "count",501 "beta": -5098.5247,502 "se": null,503 "t": -0.752,504 "p": null,505 "p_stars": "",506 "ci_lo": null,507 "ci_hi": null,508 "page": 98,509 "confidence": "high",510 "notes": "Height of house in stories"511 },512 {513 "model_id": "TXI-c3",514 "var_name_printed": "Basement",515 "taxonomy_id": "basement",516 "x_transform": "binary",517 "x_unit": "binary",518 "beta": 4885.4162,519 "se": null,520 "t": 3.05,521 "p": null,522 "p_stars": "",523 "ci_lo": null,524 "ci_hi": null,525 "page": 98,526 "confidence": "high",527 "notes": "Basement dummy"528 },529 {530 "model_id": "TXI-c3",531 "var_name_printed": "Fireplace",532 "taxonomy_id": "fireplace",533 "x_transform": "binary",534 "x_unit": "binary",535 "beta": 1053.9359,536 "se": null,537 "t": 0.597,538 "p": null,539 "p_stars": "",540 "ci_lo": null,541 "ci_hi": null,542 "page": 98,543 "confidence": "high",544 "notes": "Fireplace dummy (no fireplaces among 1971 sales)"545 },546 {547 "model_id": "TXI-c3",548 "var_name_printed": "Garage",549 "taxonomy_id": "garage",550 "x_transform": "binary",551 "x_unit": "binary",552 "beta": 7811.6183,553 "se": null,554 "t": 4.205,555 "p": null,556 "p_stars": "",557 "ci_lo": null,558 "ci_hi": null,559 "page": 98,560 "confidence": "high",561 "notes": "Garage dummy"562 }563 ]564}