{
 "record_id": "6c0fa6707be0f8c5edd0d4088f7dfb356412099f",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "The demand for air quality: evidence from the housing market in Bogota, Colombia",
  "year": 2018,
  "doi": "10.1017/s1355770x18000050",
  "country": "Colombia",
  "region_city": "Bogota D.C.",
  "sample_start": 2011,
  "sample_end": 2011,
  "property_type": "mixed",
  "price_type": "rent",
  "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",
  "document_type": "journal",
  "estimators": [
   "other"
  ],
  "spatial_method": "locality (spatial) fixed effects; frontier model with heteroskedastic error (sigma2_mu function of PM10, strata, strata*PM10, spatial FE)",
  "time_fe": false,
  "location_fe": true,
  "se_type": "unknown",
  "n_obs_total": 6061,
  "ai_methods": [],
  "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."
 },
 "models": [
  {
   "model_id": "T1-c1",
   "table": "1",
   "column": "1",
   "page": 12,
   "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",
   "dep_transform": "log",
   "estimator": "other",
   "n_obs": 6061,
   "r2": null,
   "se_or_t_in_parentheses": "se",
   "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"
  },
  {
   "model_id": "T1-c2",
   "table": "1",
   "column": "2",
   "page": 12,
   "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",
   "dep_transform": "log",
   "estimator": "other",
   "n_obs": 4153,
   "r2": null,
   "se_or_t_in_parentheses": "se",
   "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"
  },
  {
   "model_id": "T1-c3",
   "table": "1",
   "column": "3",
   "page": 12,
   "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",
   "dep_transform": "log",
   "estimator": "other",
   "n_obs": 319,
   "r2": null,
   "se_or_t_in_parentheses": "se",
   "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"
  },
  {
   "model_id": "T1-c4",
   "table": "1",
   "column": "4",
   "page": 12,
   "dep_var": "log monthly rent (reported or hypothetical imputed rent, COP/month)",
   "dep_transform": "log",
   "estimator": "other",
   "n_obs": 1562,
   "r2": null,
   "se_or_t_in_parentheses": "se",
   "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"
  }
 ],
 "coefficients": [
  {
   "model_id": "T1-c1",
   "var_name_printed": "PM10",
   "taxonomy_id": "air_pollution",
   "x_transform": "level",
   "x_unit": "ug/m3",
   "beta": -0.015372,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '0' and unusable; stars only."
  },
  {
   "model_id": "T1-c2",
   "var_name_printed": "PM10",
   "taxonomy_id": "air_pollution",
   "x_transform": "level",
   "x_unit": "ug/m3",
   "beta": -0.0061217,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "**",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '0' and unusable; stars only."
  },
  {
   "model_id": "T1-c3",
   "var_name_printed": "PM10",
   "taxonomy_id": "air_pollution",
   "x_transform": "level",
   "x_unit": "ug/m3",
   "beta": -0.024382,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "*",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '-0.01' and unusable; stars only."
  },
  {
   "model_id": "T1-c4",
   "var_name_printed": "PM10",
   "taxonomy_id": "air_pollution",
   "x_transform": "level",
   "x_unit": "ug/m3",
   "beta": -0.021776,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 12,
   "confidence": "medium",
   "notes": "Annual mean PM10 concentration (VNA interpolation, 2011). Printed SE in parentheses is rounded to '-0.01' and unusable; stars only."
  }
 ]
}