{
 "record_id": "c457882224ad7235eecc5a3f2b95232d76a155e7",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "Unleashing the hidden green value: assessing the impact of energy certification and environmental amenities on real estate through hedonic modelling",
  "year": 2025,
  "doi": "10.36253/aestim-17418",
  "country": "Italy",
  "region_city": "Padua (Padova), Veneto",
  "sample_start": 2022,
  "sample_end": 2023,
  "property_type": "condo_apartment",
  "price_type": "transaction",
  "data_source": "Registered sale contracts downloaded from the Italian Revenue Agency (Agenzia delle Entrate) portal, 222 apartment sales 2022-2023, enriched with GIS data",
  "document_type": "journal",
  "estimators": [
   "OLS"
  ],
  "spatial_method": "none",
  "time_fe": false,
  "location_fe": false,
  "se_type": "unknown",
  "n_obs_total": 222,
  "ai_methods": [],
  "notes": "Semi-log OLS: dependent variable = log of apartment price per square metre (EUR/m2). Table 3 prints coefficients with significance stars only (no SE/t/p), plus the implied % variation. Star legend: * p<0.10, ** p<0.05, *** p<0.01, **** p<0.001. Some coefficients printed with a stray space ('0. 0541'). R2 = 0.551, adj. R2 = 0.521. 'Year in which the heating system was installed' is a calendar year (not age) and 'Mediation' = sold through a real estate agency."
 },
 "models": [
  {
   "model_id": "T3-c1",
   "table": "3",
   "column": "1",
   "page": 9,
   "dep_var": "log of apartment price per square meter (EUR/m2)",
   "dep_transform": "per_m2",
   "estimator": "OLS",
   "n_obs": 222,
   "r2": 0.551,
   "se_or_t_in_parentheses": "none",
   "sample_subset": "All 222 apartment sales, Padua 2022-2023; R2 0.551 (adj. 0.521)"
  }
 ],
 "coefficients": [
  {
   "model_id": "T3-c1",
   "var_name_printed": "Apartment surface (m2)",
   "taxonomy_id": "living_area",
   "x_transform": "level",
   "x_unit": "m2",
   "beta": -0.00347,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "****",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Apartment surface in m2 (price per m2 model). Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Energy class A",
   "taxonomy_id": "energy_efficiency",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 0.265,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "**",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "EPC class A (A1-A4) vs classes B-G. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Age of the apartment",
   "taxonomy_id": "age",
   "x_transform": "level",
   "x_unit": "years",
   "beta": -0.0166,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "****",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Age in years; quadratic. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Squared age of the apartment",
   "taxonomy_id": "age",
   "x_transform": "squared",
   "x_unit": "years",
   "beta": 0.000125,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "****",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Age squared. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Year in which the heating system was installed",
   "taxonomy_id": "heating",
   "x_transform": "other",
   "x_unit": "years",
   "beta": 0.00691,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Calendar year of installation of the heating system (level in years, not a dummy). Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Bathrooms number",
   "taxonomy_id": "bathrooms",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 0.173,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Number of bathrooms. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Elevator",
   "taxonomy_id": "accessibility",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 0.161,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "****",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Elevator present. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Train station distance (Km)",
   "taxonomy_id": "transit_distance",
   "x_transform": "level",
   "x_unit": "km",
   "beta": -0.123,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "**",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Distance to train station in km. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Number of schools within a radius 200 m",
   "taxonomy_id": "school_distance",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 0.122,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "**",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Count of schools within 200 m (not a distance). Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Number of supermarkets within a radius 200 m",
   "taxonomy_id": "commercial_distance",
   "x_transform": "level",
   "x_unit": "count",
   "beta": 0.0965,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Count of supermarkets within 200 m (not a distance). Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Urban parks area (ha) within a radius of 100 m",
   "taxonomy_id": "green_space",
   "x_transform": "level",
   "x_unit": "ha",
   "beta": 0.0541,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Park area in hectares within 100 m; printed as '0. 0541'. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Urban parks area (ha) between 100 and 200 m",
   "taxonomy_id": "green_space",
   "x_transform": "level",
   "x_unit": "ha",
   "beta": 0.0393,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "**",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Park area in hectares between 100 and 200 m; printed as '0. 0393'. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Waterway distance (Km)",
   "taxonomy_id": "water_proximity",
   "x_transform": "level",
   "x_unit": "km",
   "beta": -0.366,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "****",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Distance to waterway in km; printed as '-0. 366'. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Mediation",
   "taxonomy_id": "other",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 0.1186,
   "se": null,
   "t": null,
   "p": null,
   "p_stars": "**",
   "ci_lo": null,
   "ci_hi": null,
   "page": 9,
   "confidence": "high",
   "notes": "Sold through a real estate agency. Dependent variable is log price per m2; only stars printed (**** p<0.001)."
  }
 ]
}