1{2 "record_id": "6c0fa6707be0f8c5edd0d4088f7dfb356412099f",3 "eligible": true,4 "exclusion_reason": null,5 "study": {6 "title": "The demand for air quality: evidence from the housing market in Bogota, Colombia",7 "year": 2018,8 "doi": "10.1017/s1355770x18000050",9 "country": "Colombia",10 "region_city": "Bogota D.C.",11 "sample_start": 2011,12 "sample_end": 2011,13 "property_type": "mixed",14 "price_type": "rent",15 "data_source": "Encuesta Multiproposito de Bogota (EMB) 2011 household survey (reported rent for renters, self-assessed hypothetical rent for owners) + RMCAB PM10 monitoring (VNA interpolation) + cadastral and police crime data",16 "document_type": "journal",17 "estimators": [18 "other"19 ],20 "spatial_method": "locality (spatial) fixed effects; frontier model with heteroskedastic error (sigma2_mu function of PM10, strata, strata*PM10, spatial FE)",21 "time_fe": false,22 "location_fe": true,23 "se_type": "unknown",24 "n_obs_total": 6061,25 "ai_methods": [],26 "notes": "First-stage hedonic rent function, semi-log (log-lin). Table 1 prints only the PM10 coefficient per submarket; structural, security, distance, cadastral, owner-bias and other-pollutant coefficients are in an online appendix (table A5) not included in the PDF. Printed standard errors under the PM10 coefficients are rounded to '0', '0', '-0.01', '-0.01' and are unusable, so se recorded as null (stars kept). Estimation uses a stochastic frontier / heteroskedastic specification (section 3, eq. 4) rather than plain OLS. Text reports ranges only for rooms (+2.97 to +6.98% per room), bathrooms (+12.29 to +16.23%), homicides per block (-0.67 to -9.95%), not extracted. Stars: *p<0.1, **p<0.05, ***p<0.01. Table 2 (second-stage demand, 2SLS) not extracted."27 },28 "models": [29 {30 "model_id": "T1-c1",31 "table": "1",32 "column": "1",33 "page": 12,34 "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",35 "dep_transform": "log",36 "estimator": "other",37 "n_obs": 6061,38 "r2": null,39 "se_or_t_in_parentheses": "se",40 "sample_subset": "All dwelling types; includes structural, security, cadastral, distance, owner-bias, other pollutants (CO, SO2, O3) and locality fixed effects; frontier model with heteroskedastic variance"41 },42 {43 "model_id": "T1-c2",44 "table": "1",45 "column": "2",46 "page": 12,47 "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",48 "dep_transform": "log",49 "estimator": "other",50 "n_obs": 4153,51 "r2": null,52 "se_or_t_in_parentheses": "se",53 "sample_subset": "Apartments submarket; includes structural, security, cadastral, distance, owner-bias, other pollutants (CO, SO2, O3) and locality fixed effects; frontier model with heteroskedastic variance"54 },55 {56 "model_id": "T1-c3",57 "table": "1",58 "column": "3",59 "page": 12,60 "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",61 "dep_transform": "log",62 "estimator": "other",63 "n_obs": 319,64 "r2": null,65 "se_or_t_in_parentheses": "se",66 "sample_subset": "Condominiums submarket; includes structural, security, cadastral, distance, owner-bias, other pollutants (CO, SO2, O3) and locality fixed effects; frontier model with heteroskedastic variance"67 },68 {69 "model_id": "T1-c4",70 "table": "1",71 "column": "4",72 "page": 12,73 "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",74 "dep_transform": "log",75 "estimator": "other",76 "n_obs": 1562,77 "r2": null,78 "se_or_t_in_parentheses": "se",79 "sample_subset": "Houses submarket; includes structural, security, cadastral, distance, owner-bias, other pollutants (CO, SO2, O3) and locality fixed effects; frontier model with heteroskedastic variance"80 }81 ],82 "coefficients": [83 {84 "model_id": "T1-c1",85 "var_name_printed": "PM10",86 "taxonomy_id": "air_pollution",87 "x_transform": "level",88 "x_unit": "ug/m3",89 "beta": -0.015372,90 "se": null,91 "t": null,92 "p": null,93 "p_stars": "***",94 "ci_lo": null,95 "ci_hi": null,96 "page": 12,97 "confidence": "medium",98 "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '0' and unusable; stars only."99 },100 {101 "model_id": "T1-c2",102 "var_name_printed": "PM10",103 "taxonomy_id": "air_pollution",104 "x_transform": "level",105 "x_unit": "ug/m3",106 "beta": -0.0061217,107 "se": null,108 "t": null,109 "p": null,110 "p_stars": "**",111 "ci_lo": null,112 "ci_hi": null,113 "page": 12,114 "confidence": "medium",115 "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '0' and unusable; stars only."116 },117 {118 "model_id": "T1-c3",119 "var_name_printed": "PM10",120 "taxonomy_id": "air_pollution",121 "x_transform": "level",122 "x_unit": "ug/m3",123 "beta": -0.024382,124 "se": null,125 "t": null,126 "p": null,127 "p_stars": "*",128 "ci_lo": null,129 "ci_hi": null,130 "page": 12,131 "confidence": "medium",132 "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '-0.01' and unusable; stars only."133 },134 {135 "model_id": "T1-c4",136 "var_name_printed": "PM10",137 "taxonomy_id": "air_pollution",138 "x_transform": "level",139 "x_unit": "ug/m3",140 "beta": -0.021776,141 "se": null,142 "t": null,143 "p": null,144 "p_stars": "***",145 "ci_lo": null,146 "ci_hi": null,147 "page": 12,148 "confidence": "medium",149 "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '-0.01' and unusable; stars only."150 }151 ]152}