1{2 "record_id": "fdf3432efb95e96e6e45a3ba105603f17a38d366",3 "eligible": true,4 "exclusion_reason": null,5 "study": {6 "title": "Hedonic valuation of marginal willingness to pay for air quality improvement",7 "year": 2012,8 "doi": "10.20885/ejem.v4i2.3318",9 "country": "Indonesia",10 "region_city": "Yogyakarta Special Territory (Yogyakarta City and Gunungkidul high-PM10 sub-districts)",11 "sample_start": 2010,12 "sample_end": 2010,13 "property_type": "single_family",14 "price_type": "transaction",15 "data_source": "Household survey of 250 residences in highest-PM10 sub-districts (self-reported sales price); PM10 from Badan Lingkungan Hidup ambient monitoring 2010, kriged",16 "document_type": "journal",17 "estimators": [18 "OLS"19 ],20 "spatial_method": "none",21 "time_fe": false,22 "location_fe": false,23 "se_type": "unknown",24 "n_obs_total": 250,25 "ai_methods": [],26 "notes": "Economic Journal of Emerging Markets 4(2) 163-172. Log-log hedonic (Table 3, p.7) with t-statistics in parentheses; Table 5 (inverse demand / second stage, p.8) not extracted. Survey year not stated (air data 2010; references accessed Feb 2012) -> sample years approximate. Price in Rupiah (mean ~3E+08). Stars legend not printed."27 },28 "models": [29 {30 "model_id": "T3-c1",31 "table": "3",32 "column": "1 (Full Model)",33 "page": 7,34 "dep_var": "ln(PPRICE) sales price of house (Rupiah)",35 "dep_transform": "log",36 "estimator": "OLS",37 "n_obs": 250,38 "r2": 0.606,39 "se_or_t_in_parentheses": "t",40 "sample_subset": "full specification; 250 household observations in Yogyakarta Special Territory; adjusted R2 printed (0.606)"41 },42 {43 "model_id": "T3-c2",44 "table": "3",45 "column": "2 (Fit Model)",46 "page": 7,47 "dep_var": "ln(PPRICE) sales price of house (Rupiah)",48 "dep_transform": "log",49 "estimator": "OLS",50 "n_obs": 250,51 "r2": 0.606,52 "se_or_t_in_parentheses": "t",53 "sample_subset": "'fit model': insignificant variables dropped; 250 household observations in Yogyakarta Special Territory; adjusted R2 printed (0.606)"54 }55 ],56 "coefficients": [57 {58 "model_id": "T3-c1",59 "var_name_printed": "LnLANDSIZE",60 "taxonomy_id": "lot_size",61 "x_transform": "log",62 "x_unit": "m2",63 "beta": 0.397,64 "se": null,65 "t": 4.381,66 "p": null,67 "p_stars": "***",68 "ci_lo": null,69 "ci_hi": null,70 "page": 7,71 "confidence": "high",72 "notes": "plot area in m2, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"73 },74 {75 "model_id": "T3-c1",76 "var_name_printed": "LnBUILDSIZE",77 "taxonomy_id": "living_area",78 "x_transform": "log",79 "x_unit": "m2",80 "beta": 0.353,81 "se": null,82 "t": 3.404,83 "p": null,84 "p_stars": "***",85 "ci_lo": null,86 "ci_hi": null,87 "page": 7,88 "confidence": "high",89 "notes": "building area in m2, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"90 },91 {92 "model_id": "T3-c1",93 "var_name_printed": "LnNUMROOM",94 "taxonomy_id": "bedrooms",95 "x_transform": "log",96 "x_unit": "count",97 "beta": 0.116,98 "se": null,99 "t": 1.121,100 "p": null,101 "p_stars": "",102 "ci_lo": null,103 "ci_hi": null,104 "page": 7,105 "confidence": "high",106 "notes": "number of rooms (all rooms, not bedrooms specifically), log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"107 },108 {109 "model_id": "T3-c1",110 "var_name_printed": "WSTRUCTDUM",111 "taxonomy_id": "roof_materials",112 "x_transform": "dummy",113 "x_unit": "binary",114 "beta": -0.081,115 "se": null,116 "t": -1.012,117 "p": null,118 "p_stars": "",119 "ci_lo": null,120 "ci_hi": null,121 "page": 7,122 "confidence": "high",123 "notes": "dummy for wall structure (coding not described; mean 1.15); values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"124 },125 {126 "model_id": "T3-c1",127 "var_name_printed": "LnDISSCHOOL",128 "taxonomy_id": "school_distance",129 "x_transform": "log",130 "x_unit": "m",131 "beta": -0.046,132 "se": null,133 "t": -0.895,134 "p": null,135 "p_stars": "",136 "ci_lo": null,137 "ci_hi": null,138 "page": 7,139 "confidence": "high",140 "notes": "distance from residence to nearest school, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"141 },142 {143 "model_id": "T3-c1",144 "var_name_printed": "LnDISHPITAL",145 "taxonomy_id": "hospital_distance",146 "x_transform": "log",147 "x_unit": "m",148 "beta": -0.163,149 "se": null,150 "t": -2.936,151 "p": null,152 "p_stars": "***",153 "ci_lo": null,154 "ci_hi": null,155 "page": 7,156 "confidence": "high",157 "notes": "distance to nearest hospital, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"158 },159 {160 "model_id": "T3-c1",161 "var_name_printed": "LnDISSPMARKET",162 "taxonomy_id": "commercial_distance",163 "x_transform": "log",164 "x_unit": "m",165 "beta": 0.103,166 "se": null,167 "t": 1.918,168 "p": null,169 "p_stars": "*",170 "ci_lo": null,171 "ci_hi": null,172 "page": 7,173 "confidence": "high",174 "notes": "distance to nearest supermarket, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"175 },176 {177 "model_id": "T3-c1",178 "var_name_printed": "LnDISREST",179 "taxonomy_id": "neighbourhood_amenities",180 "x_transform": "log",181 "x_unit": "m",182 "beta": -0.155,183 "se": null,184 "t": -3.606,185 "p": null,186 "p_stars": "***",187 "ci_lo": null,188 "ci_hi": null,189 "page": 7,190 "confidence": "high",191 "notes": "distance to nearest restaurant, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"192 },193 {194 "model_id": "T3-c1",195 "var_name_printed": "LnDISCITY",196 "taxonomy_id": "cbd_distance",197 "x_transform": "log",198 "x_unit": "m",199 "beta": 0.039,200 "se": null,201 "t": 0.68,202 "p": null,203 "p_stars": "",204 "ci_lo": null,205 "ci_hi": null,206 "page": 7,207 "confidence": "high",208 "notes": "distance from city (centre), metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"209 },210 {211 "model_id": "T3-c1",212 "var_name_printed": "LnDISMSTREET",213 "taxonomy_id": "highway_distance",214 "x_transform": "log",215 "x_unit": "m",216 "beta": 0.091,217 "se": null,218 "t": 3.089,219 "p": null,220 "p_stars": "***",221 "ci_lo": null,222 "ci_hi": null,223 "page": 7,224 "confidence": "high",225 "notes": "distance to main street, metres, log (positive = farther from main road is dearer); values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"226 },227 {228 "model_id": "T3-c1",229 "var_name_printed": "GARDENDUM",230 "taxonomy_id": "green_space",231 "x_transform": "dummy",232 "x_unit": "binary",233 "beta": 0.261,234 "se": null,235 "t": 2.637,236 "p": null,237 "p_stars": "***",238 "ci_lo": null,239 "ci_hi": null,240 "page": 7,241 "confidence": "high",242 "notes": "dummy for being close to a garden (coded 1/2 in Table 2, mean 1.79); values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"243 },244 {245 "model_id": "T3-c1",246 "var_name_printed": "LnPM10",247 "taxonomy_id": "air_pollution",248 "x_transform": "log",249 "x_unit": "ppm",250 "beta": -1.355,251 "se": null,252 "t": -2.355,253 "p": null,254 "p_stars": "**",255 "ci_lo": null,256 "ci_hi": null,257 "page": 7,258 "confidence": "medium",259 "notes": "PM10 concentration (printed unit 'ppm', mean 1,223.12), log; 2010 ambient monitoring data, kriged; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%; Full-model LnPM10 elasticity -1.355 differs sharply from fit-model -0.320 and text quotes -0.32"260 },261 {262 "model_id": "T3-c2",263 "var_name_printed": "LnLANDSIZE",264 "taxonomy_id": "lot_size",265 "x_transform": "log",266 "x_unit": "m2",267 "beta": 0.396,268 "se": null,269 "t": 4.432,270 "p": null,271 "p_stars": "***",272 "ci_lo": null,273 "ci_hi": null,274 "page": 7,275 "confidence": "high",276 "notes": "plot area in m2, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"277 },278 {279 "model_id": "T3-c2",280 "var_name_printed": "LnBUILDSIZE",281 "taxonomy_id": "living_area",282 "x_transform": "log",283 "x_unit": "m2",284 "beta": 0.393,285 "se": null,286 "t": 3.915,287 "p": null,288 "p_stars": "***",289 "ci_lo": null,290 "ci_hi": null,291 "page": 7,292 "confidence": "high",293 "notes": "building area in m2, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"294 },295 {296 "model_id": "T3-c2",297 "var_name_printed": "LnDISHPITAL",298 "taxonomy_id": "hospital_distance",299 "x_transform": "log",300 "x_unit": "m",301 "beta": -0.16,302 "se": null,303 "t": -3.115,304 "p": null,305 "p_stars": "***",306 "ci_lo": null,307 "ci_hi": null,308 "page": 7,309 "confidence": "high",310 "notes": "distance to nearest hospital, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"311 },312 {313 "model_id": "T3-c2",314 "var_name_printed": "LnDISSPMARKET",315 "taxonomy_id": "commercial_distance",316 "x_transform": "log",317 "x_unit": "m",318 "beta": 0.103,319 "se": null,320 "t": 1.975,321 "p": null,322 "p_stars": "**",323 "ci_lo": null,324 "ci_hi": null,325 "page": 7,326 "confidence": "high",327 "notes": "distance to nearest supermarket, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"328 },329 {330 "model_id": "T3-c2",331 "var_name_printed": "LnDISREST",332 "taxonomy_id": "neighbourhood_amenities",333 "x_transform": "log",334 "x_unit": "m",335 "beta": -0.16,336 "se": null,337 "t": -3.999,338 "p": null,339 "p_stars": "***",340 "ci_lo": null,341 "ci_hi": null,342 "page": 7,343 "confidence": "high",344 "notes": "distance to nearest restaurant, metres, log; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"345 },346 {347 "model_id": "T3-c2",348 "var_name_printed": "LnDISMSTREET",349 "taxonomy_id": "highway_distance",350 "x_transform": "log",351 "x_unit": "m",352 "beta": 0.092,353 "se": null,354 "t": 3.153,355 "p": null,356 "p_stars": "***",357 "ci_lo": null,358 "ci_hi": null,359 "page": 7,360 "confidence": "high",361 "notes": "distance to main street, metres, log (positive = farther from main road is dearer); values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"362 },363 {364 "model_id": "T3-c2",365 "var_name_printed": "GARDENDUM",366 "taxonomy_id": "green_space",367 "x_transform": "dummy",368 "x_unit": "binary",369 "beta": 0.232,370 "se": null,371 "t": 2.377,372 "p": null,373 "p_stars": "**",374 "ci_lo": null,375 "ci_hi": null,376 "page": 7,377 "confidence": "high",378 "notes": "dummy for being close to a garden (coded 1/2 in Table 2, mean 1.79); values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%"379 },380 {381 "model_id": "T3-c2",382 "var_name_printed": "LnPM10",383 "taxonomy_id": "air_pollution",384 "x_transform": "log",385 "x_unit": "ppm",386 "beta": -0.32,387 "se": null,388 "t": -2.806,389 "p": null,390 "p_stars": "***",391 "ci_lo": null,392 "ci_hi": null,393 "page": 7,394 "confidence": "medium",395 "notes": "PM10 concentration (printed unit 'ppm', mean 1,223.12), log; 2010 ambient monitoring data, kriged; values in parentheses are t-statistics (no legend printed; consistent with coef/SE, e.g. constant 17.181 (17.689)); stars legend not printed, text implies *** 1%, ** 5%, * 10%; Full-model LnPM10 elasticity -1.355 differs sharply from fit-model -0.320 and text quotes -0.32"396 }397 ]398}