1{2 "record_id": "b922ab81201881b47779769df9e76de174e13df7",3 "eligible": true,4 "exclusion_reason": null,5 "study": {6 "title": "Comparing traditional and machine learning techniques in apartments mass appraisal in Fortaleza, Brazil",7 "year": 2025,8 "doi": "10.36253/aestim-15344",9 "country": "Brazil",10 "region_city": "Fortaleza (Ceará)",11 "sample_start": 2017,12 "sample_end": 2021,13 "property_type": "condo_apartment",14 "price_type": "transaction_and_listing",15 "data_source": "Real Estate Market Observatory of the Local Finance Secretary of Fortaleza: 43,585 apartment listed prices and actual sales 2017-2021; training set 32,688 used for the regressions (test set 10,897)",16 "document_type": "journal",17 "estimators": [18 "OLS",19 "spatial_error"20 ],21 "spatial_method": "spatial error model (GMM, Arraiz et al. 2010), queen contiguity weights",22 "time_fe": true,23 "location_fe": false,24 "se_type": "unknown",25 "n_obs_total": 32688,26 "ai_methods": [27 "MARS",28 "M5P",29 "random_forest",30 "quantile_random_forest",31 "GBM",32 "LightGBM",33 "CatBoost",34 "XGBoost",35 "deep_learning"36 ],37 "notes": "Aestimum 86 (2025). Table A1 reports coefficients of the OLS (MRA) and spatial error (SER, GMM) models; no SEs: '*' = p-value < 0.01, otherwise the p-value is printed in parentheses. Dependent variable ln(price) in BRL; sample mixes asking and sale prices with 'sale' and 'listing' dummies (extracted as 'other'). Year dummies a2018-a2021 not extracted. Table A2 (MARS hinge-function coefficients) and ML models (feature importance only) not extracted. Normalised coordinates xcen/ycen listed in Table 2 do not appear in Table A1."38 },39 "models": [40 {41 "model_id": "TA1-MRA",42 "table": "A1",43 "column": "MRA (OLS)",44 "page": 16,45 "dep_var": "ln(price, BRL)",46 "dep_transform": "log",47 "estimator": "OLS",48 "n_obs": 32688,49 "r2": 0.9386,50 "se_or_t_in_parentheses": "p",51 "sample_subset": "Training set"52 },53 {54 "model_id": "TA1-SER",55 "table": "A1",56 "column": "SER (GMM)",57 "page": 16,58 "dep_var": "ln(price, BRL)",59 "dep_transform": "log",60 "estimator": "spatial_error",61 "n_obs": 32688,62 "r2": 0.938,63 "se_or_t_in_parentheses": "p",64 "sample_subset": "Training set; lambda = 0.6389*"65 }66 ],67 "coefficients": [68 {69 "model_id": "TA1-MRA",70 "var_name_printed": "parcelarea",71 "taxonomy_id": "lot_size",72 "x_transform": "level",73 "x_unit": "m2",74 "beta": -1.24e-05,75 "se": null,76 "t": null,77 "p": null,78 "p_stars": "*",79 "ci_lo": null,80 "ci_hi": null,81 "page": 16,82 "confidence": "high",83 "notes": "proportional land-plot area attributed to the apartment (ideal fraction), m2; '*' = p<0.01"84 },85 {86 "model_id": "TA1-SER",87 "var_name_printed": "parcelarea",88 "taxonomy_id": "lot_size",89 "x_transform": "level",90 "x_unit": "m2",91 "beta": -1.26e-05,92 "se": null,93 "t": null,94 "p": null,95 "p_stars": "*",96 "ci_lo": null,97 "ci_hi": null,98 "page": 16,99 "confidence": "high",100 "notes": "proportional land-plot area attributed to the apartment (ideal fraction), m2; '*' = p<0.01"101 },102 {103 "model_id": "TA1-MRA",104 "var_name_printed": "income",105 "taxonomy_id": "income",106 "x_transform": "level",107 "x_unit": "multiples of Brazilian minimum wage",108 "beta": 0.012,109 "se": null,110 "t": null,111 "p": null,112 "p_stars": "*",113 "ci_lo": null,114 "ci_hi": null,115 "page": 16,116 "confidence": "high",117 "notes": "mean income of head of family in the census sector, in minimum wages; '*' = p<0.01"118 },119 {120 "model_id": "TA1-SER",121 "var_name_printed": "income",122 "taxonomy_id": "income",123 "x_transform": "level",124 "x_unit": "multiples of Brazilian minimum wage",125 "beta": 0.0118,126 "se": null,127 "t": null,128 "p": null,129 "p_stars": "*",130 "ci_lo": null,131 "ci_hi": null,132 "page": 16,133 "confidence": "high",134 "notes": "mean income of head of family in the census sector, in minimum wages; '*' = p<0.01"135 },136 {137 "model_id": "TA1-MRA",138 "var_name_printed": "vertdens",139 "taxonomy_id": "density",140 "x_transform": "level",141 "x_unit": "index",142 "beta": 0.183,143 "se": null,144 "t": null,145 "p": null,146 "p_stars": "*",147 "ci_lo": null,148 "ci_hi": null,149 "page": 16,150 "confidence": "high",151 "notes": "verticalization density (concentration of units in neighbourhood), 0-1; '*' = p<0.01"152 },153 {154 "model_id": "TA1-SER",155 "var_name_printed": "vertdens",156 "taxonomy_id": "density",157 "x_transform": "level",158 "x_unit": "index",159 "beta": 0.1919,160 "se": null,161 "t": null,162 "p": null,163 "p_stars": "*",164 "ci_lo": null,165 "ci_hi": null,166 "page": 16,167 "confidence": "high",168 "notes": "verticalization density (concentration of units in neighbourhood), 0-1; '*' = p<0.01"169 },170 {171 "model_id": "TA1-MRA",172 "var_name_printed": "distpv",173 "taxonomy_id": "neighbourhood_amenities",174 "x_transform": "level",175 "x_unit": "m",176 "beta": -8.4e-06,177 "se": null,178 "t": null,179 "p": 0.0137,180 "p_stars": "",181 "ci_lo": null,182 "ci_hi": null,183 "page": 16,184 "confidence": "high",185 "notes": "nearest distance to main urban amenities; p-value printed in parentheses"186 },187 {188 "model_id": "TA1-SER",189 "var_name_printed": "distpv",190 "taxonomy_id": "neighbourhood_amenities",191 "x_transform": "level",192 "x_unit": "m",193 "beta": -1.09e-05,194 "se": null,195 "t": null,196 "p": 0.1556,197 "p_stars": "",198 "ci_lo": null,199 "ci_hi": null,200 "page": 16,201 "confidence": "high",202 "notes": "nearest distance to main urban amenities; p-value printed in parentheses"203 },204 {205 "model_id": "TA1-MRA",206 "var_name_printed": "distassp",207 "taxonomy_id": "other",208 "x_transform": "level",209 "x_unit": "m",210 "beta": 4.88e-05,211 "se": null,212 "t": null,213 "p": null,214 "p_stars": "*",215 "ci_lo": null,216 "ci_hi": null,217 "page": 16,218 "confidence": "high",219 "notes": "distance to the nearest precarious settlement (informal settlement); '*' = p<0.01"220 },221 {222 "model_id": "TA1-SER",223 "var_name_printed": "distassp",224 "taxonomy_id": "other",225 "x_transform": "level",226 "x_unit": "m",227 "beta": 3.93e-05,228 "se": null,229 "t": null,230 "p": null,231 "p_stars": "*",232 "ci_lo": null,233 "ci_hi": null,234 "page": 16,235 "confidence": "high",236 "notes": "distance to the nearest precarious settlement (informal settlement); '*' = p<0.01"237 },238 {239 "model_id": "TA1-MRA",240 "var_name_printed": "distbm",241 "taxonomy_id": "water_proximity",242 "x_transform": "level",243 "x_unit": "m",244 "beta": -1.34e-05,245 "se": null,246 "t": null,247 "p": null,248 "p_stars": "*",249 "ci_lo": null,250 "ci_hi": null,251 "page": 16,252 "confidence": "high",253 "notes": "distance to the beach (north of the city); '*' = p<0.01"254 },255 {256 "model_id": "TA1-SER",257 "var_name_printed": "distbm",258 "taxonomy_id": "water_proximity",259 "x_transform": "level",260 "x_unit": "m",261 "beta": -1.49e-05,262 "se": null,263 "t": null,264 "p": null,265 "p_stars": "*",266 "ci_lo": null,267 "ci_hi": null,268 "page": 16,269 "confidence": "high",270 "notes": "distance to the beach (north of the city); '*' = p<0.01"271 },272 {273 "model_id": "TA1-MRA",274 "var_name_printed": "elev",275 "taxonomy_id": "accessibility",276 "x_transform": "binary",277 "x_unit": "binary",278 "beta": 0.0372,279 "se": null,280 "t": null,281 "p": null,282 "p_stars": "*",283 "ci_lo": null,284 "ci_hi": null,285 "page": 16,286 "confidence": "high",287 "notes": "presence of elevator(s); '*' = p<0.01"288 },289 {290 "model_id": "TA1-SER",291 "var_name_printed": "elev",292 "taxonomy_id": "accessibility",293 "x_transform": "binary",294 "x_unit": "binary",295 "beta": 0.0488,296 "se": null,297 "t": null,298 "p": null,299 "p_stars": "*",300 "ci_lo": null,301 "ci_hi": null,302 "page": 16,303 "confidence": "high",304 "notes": "presence of elevator(s); '*' = p<0.01"305 },306 {307 "model_id": "TA1-MRA",308 "var_name_printed": "pool",309 "taxonomy_id": "pool",310 "x_transform": "binary",311 "x_unit": "binary",312 "beta": 0.1085,313 "se": null,314 "t": null,315 "p": null,316 "p_stars": "*",317 "ci_lo": null,318 "ci_hi": null,319 "page": 16,320 "confidence": "high",321 "notes": "; '*' = p<0.01"322 },323 {324 "model_id": "TA1-SER",325 "var_name_printed": "pool",326 "taxonomy_id": "pool",327 "x_transform": "binary",328 "x_unit": "binary",329 "beta": 0.0938,330 "se": null,331 "t": null,332 "p": null,333 "p_stars": "*",334 "ci_lo": null,335 "ci_hi": null,336 "page": 16,337 "confidence": "high",338 "notes": "; '*' = p<0.01"339 },340 {341 "model_id": "TA1-MRA",342 "var_name_printed": "nfloors",343 "taxonomy_id": "storeys",344 "x_transform": "level",345 "x_unit": "count",346 "beta": 0.0104,347 "se": null,348 "t": null,349 "p": null,350 "p_stars": "*",351 "ci_lo": null,352 "ci_hi": null,353 "page": 16,354 "confidence": "high",355 "notes": "total number of floors in the building; '*' = p<0.01"356 },357 {358 "model_id": "TA1-SER",359 "var_name_printed": "nfloors",360 "taxonomy_id": "storeys",361 "x_transform": "level",362 "x_unit": "count",363 "beta": 0.0103,364 "se": null,365 "t": null,366 "p": null,367 "p_stars": "*",368 "ci_lo": null,369 "ci_hi": null,370 "page": 16,371 "confidence": "high",372 "notes": "total number of floors in the building; '*' = p<0.01"373 },374 {375 "model_id": "TA1-MRA",376 "var_name_printed": "standard3",377 "taxonomy_id": "condition",378 "x_transform": "dummy",379 "x_unit": "binary",380 "beta": 0.0989,381 "se": null,382 "t": null,383 "p": null,384 "p_stars": "*",385 "ci_lo": null,386 "ci_hi": null,387 "page": 16,388 "confidence": "high",389 "notes": "finishing standard 3 (economical); ordinal 1 rustic ... 8 luxury; '*' = p<0.01"390 },391 {392 "model_id": "TA1-SER",393 "var_name_printed": "standard3",394 "taxonomy_id": "condition",395 "x_transform": "dummy",396 "x_unit": "binary",397 "beta": 0.1833,398 "se": null,399 "t": null,400 "p": null,401 "p_stars": "*",402 "ci_lo": null,403 "ci_hi": null,404 "page": 16,405 "confidence": "high",406 "notes": "finishing standard 3 (economical); ordinal 1 rustic ... 8 luxury; '*' = p<0.01"407 },408 {409 "model_id": "TA1-MRA",410 "var_name_printed": "standard4",411 "taxonomy_id": "condition",412 "x_transform": "dummy",413 "x_unit": "binary",414 "beta": 0.3631,415 "se": null,416 "t": null,417 "p": null,418 "p_stars": "*",419 "ci_lo": null,420 "ci_hi": null,421 "page": 16,422 "confidence": "high",423 "notes": "finishing standard 4 (simple); '*' = p<0.01"424 },425 {426 "model_id": "TA1-SER",427 "var_name_printed": "standard4",428 "taxonomy_id": "condition",429 "x_transform": "dummy",430 "x_unit": "binary",431 "beta": 0.3979,432 "se": null,433 "t": null,434 "p": null,435 "p_stars": "*",436 "ci_lo": null,437 "ci_hi": null,438 "page": 16,439 "confidence": "high",440 "notes": "finishing standard 4 (simple); '*' = p<0.01"441 },442 {443 "model_id": "TA1-MRA",444 "var_name_printed": "standard5",445 "taxonomy_id": "condition",446 "x_transform": "dummy",447 "x_unit": "binary",448 "beta": 0.5058,449 "se": null,450 "t": null,451 "p": null,452 "p_stars": "*",453 "ci_lo": null,454 "ci_hi": null,455 "page": 16,456 "confidence": "high",457 "notes": "finishing standard 5 (medium); '*' = p<0.01"458 },459 {460 "model_id": "TA1-SER",461 "var_name_printed": "standard5",462 "taxonomy_id": "condition",463 "x_transform": "dummy",464 "x_unit": "binary",465 "beta": 0.5163,466 "se": null,467 "t": null,468 "p": null,469 "p_stars": "*",470 "ci_lo": null,471 "ci_hi": null,472 "page": 16,473 "confidence": "high",474 "notes": "finishing standard 5 (medium); '*' = p<0.01"475 },476 {477 "model_id": "TA1-MRA",478 "var_name_printed": "standard6",479 "taxonomy_id": "condition",480 "x_transform": "dummy",481 "x_unit": "binary",482 "beta": 0.689,483 "se": null,484 "t": null,485 "p": null,486 "p_stars": "*",487 "ci_lo": null,488 "ci_hi": null,489 "page": 16,490 "confidence": "high",491 "notes": "finishing standard 6 (superior); '*' = p<0.01"492 },493 {494 "model_id": "TA1-SER",495 "var_name_printed": "standard6",496 "taxonomy_id": "condition",497 "x_transform": "dummy",498 "x_unit": "binary",499 "beta": 0.6667,500 "se": null,501 "t": null,502 "p": null,503 "p_stars": "*",504 "ci_lo": null,505 "ci_hi": null,506 "page": 16,507 "confidence": "high",508 "notes": "finishing standard 6 (superior); '*' = p<0.01"509 },510 {511 "model_id": "TA1-MRA",512 "var_name_printed": "standard7",513 "taxonomy_id": "condition",514 "x_transform": "dummy",515 "x_unit": "binary",516 "beta": 0.8583,517 "se": null,518 "t": null,519 "p": null,520 "p_stars": "*",521 "ci_lo": null,522 "ci_hi": null,523 "page": 16,524 "confidence": "high",525 "notes": "finishing standard 7 (fine); '*' = p<0.01"526 },527 {528 "model_id": "TA1-SER",529 "var_name_printed": "standard7",530 "taxonomy_id": "condition",531 "x_transform": "dummy",532 "x_unit": "binary",533 "beta": 0.8574,534 "se": null,535 "t": null,536 "p": null,537 "p_stars": "*",538 "ci_lo": null,539 "ci_hi": null,540 "page": 16,541 "confidence": "high",542 "notes": "finishing standard 7 (fine); '*' = p<0.01"543 },544 {545 "model_id": "TA1-MRA",546 "var_name_printed": "standard8",547 "taxonomy_id": "condition",548 "x_transform": "dummy",549 "x_unit": "binary",550 "beta": 1.1789,551 "se": null,552 "t": null,553 "p": null,554 "p_stars": "*",555 "ci_lo": null,556 "ci_hi": null,557 "page": 16,558 "confidence": "high",559 "notes": "finishing standard 8 (luxury); '*' = p<0.01"560 },561 {562 "model_id": "TA1-SER",563 "var_name_printed": "standard8",564 "taxonomy_id": "condition",565 "x_transform": "dummy",566 "x_unit": "binary",567 "beta": 1.1219,568 "se": null,569 "t": null,570 "p": null,571 "p_stars": "*",572 "ci_lo": null,573 "ci_hi": null,574 "page": 16,575 "confidence": "high",576 "notes": "finishing standard 8 (luxury); '*' = p<0.01"577 },578 {579 "model_id": "TA1-MRA",580 "var_name_printed": "bedroom",581 "taxonomy_id": "bedrooms",582 "x_transform": "level",583 "x_unit": "count",584 "beta": 0.0084,585 "se": null,586 "t": null,587 "p": 0.0015,588 "p_stars": "",589 "ci_lo": null,590 "ci_hi": null,591 "page": 16,592 "confidence": "high",593 "notes": "; p-value printed in parentheses"594 },595 {596 "model_id": "TA1-SER",597 "var_name_printed": "bedroom",598 "taxonomy_id": "bedrooms",599 "x_transform": "level",600 "x_unit": "count",601 "beta": 0.0163,602 "se": null,603 "t": null,604 "p": null,605 "p_stars": "*",606 "ci_lo": null,607 "ci_hi": null,608 "page": 16,609 "confidence": "high",610 "notes": "; '*' = p<0.01"611 },612 {613 "model_id": "TA1-MRA",614 "var_name_printed": "garage",615 "taxonomy_id": "garage",616 "x_transform": "level",617 "x_unit": "count",618 "beta": 0.0317,619 "se": null,620 "t": null,621 "p": null,622 "p_stars": "*",623 "ci_lo": null,624 "ci_hi": null,625 "page": 16,626 "confidence": "high",627 "notes": "number of garage spaces; '*' = p<0.01"628 },629 {630 "model_id": "TA1-SER",631 "var_name_printed": "garage",632 "taxonomy_id": "garage",633 "x_transform": "level",634 "x_unit": "count",635 "beta": 0.0305,636 "se": null,637 "t": null,638 "p": null,639 "p_stars": "*",640 "ci_lo": null,641 "ci_hi": null,642 "page": 16,643 "confidence": "high",644 "notes": "number of garage spaces; '*' = p<0.01"645 },646 {647 "model_id": "TA1-MRA",648 "var_name_printed": "ln_privarea",649 "taxonomy_id": "living_area",650 "x_transform": "log",651 "x_unit": "m2",652 "beta": 0.368,653 "se": null,654 "t": null,655 "p": null,656 "p_stars": "*",657 "ci_lo": null,658 "ci_hi": null,659 "page": 16,660 "confidence": "high",661 "notes": "private (exclusive) area of the apartment; '*' = p<0.01"662 },663 {664 "model_id": "TA1-SER",665 "var_name_printed": "ln_privarea",666 "taxonomy_id": "living_area",667 "x_transform": "log",668 "x_unit": "m2",669 "beta": 0.367,670 "se": null,671 "t": null,672 "p": null,673 "p_stars": "*",674 "ci_lo": null,675 "ci_hi": null,676 "page": 16,677 "confidence": "high",678 "notes": "private (exclusive) area of the apartment; '*' = p<0.01"679 },680 {681 "model_id": "TA1-MRA",682 "var_name_printed": "ln_totalarea",683 "taxonomy_id": "other",684 "x_transform": "log",685 "x_unit": "m2",686 "beta": 0.3021,687 "se": null,688 "t": null,689 "p": null,690 "p_stars": "*",691 "ci_lo": null,692 "ci_hi": null,693 "page": 16,694 "confidence": "high",695 "notes": "ln_totalarea: total area incl. share of common areas (second area measure alongside private area); '*' = p<0.01"696 },697 {698 "model_id": "TA1-SER",699 "var_name_printed": "ln_totalarea",700 "taxonomy_id": "other",701 "x_transform": "log",702 "x_unit": "m2",703 "beta": 0.3061,704 "se": null,705 "t": null,706 "p": null,707 "p_stars": "*",708 "ci_lo": null,709 "ci_hi": null,710 "page": 16,711 "confidence": "high",712 "notes": "ln_totalarea: total area incl. share of common areas (second area measure alongside private area); '*' = p<0.01"713 },714 {715 "model_id": "TA1-MRA",716 "var_name_printed": "lastfloor",717 "taxonomy_id": "floor_level",718 "x_transform": "dummy",719 "x_unit": "binary",720 "beta": 0.0689,721 "se": null,722 "t": null,723 "p": null,724 "p_stars": "*",725 "ci_lo": null,726 "ci_hi": null,727 "page": 16,728 "confidence": "high",729 "notes": "top-floor dummy; '*' = p<0.01"730 },731 {732 "model_id": "TA1-SER",733 "var_name_printed": "lastfloor",734 "taxonomy_id": "floor_level",735 "x_transform": "dummy",736 "x_unit": "binary",737 "beta": 0.0799,738 "se": null,739 "t": null,740 "p": null,741 "p_stars": "*",742 "ci_lo": null,743 "ci_hi": null,744 "page": 16,745 "confidence": "high",746 "notes": "top-floor dummy; '*' = p<0.01"747 },748 {749 "model_id": "TA1-MRA",750 "var_name_printed": "floor",751 "taxonomy_id": "floor_level",752 "x_transform": "level",753 "x_unit": "count",754 "beta": 0.0065,755 "se": null,756 "t": null,757 "p": null,758 "p_stars": "*",759 "ci_lo": null,760 "ci_hi": null,761 "page": 16,762 "confidence": "high",763 "notes": "apartment floor; '*' = p<0.01"764 },765 {766 "model_id": "TA1-SER",767 "var_name_printed": "floor",768 "taxonomy_id": "floor_level",769 "x_transform": "level",770 "x_unit": "count",771 "beta": 0.0065,772 "se": null,773 "t": null,774 "p": null,775 "p_stars": "*",776 "ci_lo": null,777 "ci_hi": null,778 "page": 16,779 "confidence": "high",780 "notes": "apartment floor; '*' = p<0.01"781 },782 {783 "model_id": "TA1-MRA",784 "var_name_printed": "age",785 "taxonomy_id": "age",786 "x_transform": "level",787 "x_unit": "years",788 "beta": -0.0097,789 "se": null,790 "t": null,791 "p": null,792 "p_stars": "*",793 "ci_lo": null,794 "ci_hi": null,795 "page": 16,796 "confidence": "high",797 "notes": "; '*' = p<0.01"798 },799 {800 "model_id": "TA1-SER",801 "var_name_printed": "age",802 "taxonomy_id": "age",803 "x_transform": "level",804 "x_unit": "years",805 "beta": -0.0098,806 "se": null,807 "t": null,808 "p": null,809 "p_stars": "*",810 "ci_lo": null,811 "ci_hi": null,812 "page": 16,813 "confidence": "high",814 "notes": "; '*' = p<0.01"815 },816 {817 "model_id": "TA1-MRA",818 "var_name_printed": "sale",819 "taxonomy_id": "other",820 "x_transform": "binary",821 "x_unit": "binary",822 "beta": -0.0626,823 "se": null,824 "t": null,825 "p": null,826 "p_stars": "*",827 "ci_lo": null,828 "ci_hi": null,829 "page": 16,830 "confidence": "high",831 "notes": "sale: effective sale dummy (transaction vs other record types); '*' = p<0.01"832 },833 {834 "model_id": "TA1-SER",835 "var_name_printed": "sale",836 "taxonomy_id": "other",837 "x_transform": "binary",838 "x_unit": "binary",839 "beta": -0.0759,840 "se": null,841 "t": null,842 "p": null,843 "p_stars": "*",844 "ci_lo": null,845 "ci_hi": null,846 "page": 16,847 "confidence": "high",848 "notes": "sale: effective sale dummy (transaction vs other record types); '*' = p<0.01"849 },850 {851 "model_id": "TA1-MRA",852 "var_name_printed": "listing",853 "taxonomy_id": "other",854 "x_transform": "binary",855 "x_unit": "binary",856 "beta": 0.0528,857 "se": null,858 "t": null,859 "p": null,860 "p_stars": "*",861 "ci_lo": null,862 "ci_hi": null,863 "page": 16,864 "confidence": "high",865 "notes": "listing: asking-price dummy (1 = list price, 0 = sale price); '*' = p<0.01"866 },867 {868 "model_id": "TA1-SER",869 "var_name_printed": "listing",870 "taxonomy_id": "other",871 "x_transform": "binary",872 "x_unit": "binary",873 "beta": 0.0407,874 "se": null,875 "t": null,876 "p": null,877 "p_stars": "*",878 "ci_lo": null,879 "ci_hi": null,880 "page": 16,881 "confidence": "high",882 "notes": "listing: asking-price dummy (1 = list price, 0 = sale price); '*' = p<0.01"883 }884 ]885}