{
 "record_id": "8fb41eefcd89b6d6746d9ab5af9f6f61e2da05b2",
 "eligible": true,
 "exclusion_reason": null,
 "study": {
  "title": "Spatial Heterogeneity in Hedonic Price Effects for Lake Water Quality",
  "year": 2023,
  "doi": "10.3368/le.100.1.102122-0086r",
  "country": "United States",
  "region_city": "Contiguous United States (national model; properties within 1,000 m of lakes > 4 ha)",
  "sample_start": null,
  "sample_end": null,
  "property_type": "single_family",
  "price_type": "transaction",
  "data_source": "Zillow ZTRAX arms-length single-family sales (PLACES lab, Boston University), prices in 2020 $; LAGOS-NE and EPA WQP Secchi depth; NHGIS median income; NED slope/elevation",
  "document_type": "journal",
  "estimators": [
   "OLS"
  ],
  "spatial_method": "census tract x year fixed effects; state and ecoregion interactions with water quality",
  "time_fe": true,
  "location_fe": true,
  "se_type": "clustered",
  "n_obs_total": 485860,
  "ai_methods": [],
  "notes": "Land Economics 100(1), accepted version. Baseline national log-log model (Eq. 1): ln(sale price) on ln(Secchi) and its interactions with lakefront buffer, ln(lake distance), demeaned ln(lake area), urban, ecoregion and state dummies, plus controls; 'all continuous covariates enter the model in log form'. Only main effects are extracted; the Secchi x state / x ecoregion / x urban / x <150 m / x lake distance / x lake area interaction terms are not extracted. Table 3 (p.34): N = 485,860, standard errors clustered at census tract level, star legend *p<.05 **p<.01 ***p<.001 (note: non-standard legend). Sale years of the ZTRAX sample are not stated in the text (sample_start/end left null). Models for Region/Division/State/Substate scales are summarised only as elasticity distributions (not extracted)."
 },
 "models": [
  {
   "model_id": "T3-c1",
   "table": "3",
   "column": "Estimate",
   "page": 34,
   "dep_var": "ln(sale price, 2020 $)",
   "dep_transform": "log",
   "estimator": "OLS",
   "n_obs": 485860,
   "r2": null,
   "se_or_t_in_parentheses": "se",
   "sample_subset": "National baseline model: summer-mean Secchi within +/-5 years, lot size/building size/building age controls, 150 m lakefront buffer, properties within 1,000 m of lake, census tract x year FE, quarter FE; SE clustered by tract"
  }
 ],
 "coefficients": [
  {
   "model_id": "T3-c1",
   "var_name_printed": "Secchi",
   "taxonomy_id": "water_quality",
   "x_transform": "log",
   "x_unit": "m (Secchi depth)",
   "beta": 0.231,
   "se": 0.034,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(summer mean Secchi depth, metres); main effect = elasticity for a lake with mean log lake area (interactions demeaned); excluded categories MN and Ecoregion 8.1"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "<150 m",
   "taxonomy_id": "water_proximity",
   "x_transform": "binary",
   "x_unit": "binary",
   "beta": 0.124,
   "se": 0.009,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "Lakefront buffer dummy: property within 150 m of the lake =1"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Lake Distance",
   "taxonomy_id": "water_proximity",
   "x_transform": "log",
   "x_unit": "m",
   "beta": -0.095,
   "se": 0.005,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(distance from property to nearest lake, metres)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Lake Area",
   "taxonomy_id": "other",
   "x_transform": "log",
   "x_unit": "ha",
   "beta": 0.013,
   "se": 0.005,
   "t": null,
   "p": null,
   "p_stars": "*",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(lake surface area, hectares), not demeaned as a control"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Median Income",
   "taxonomy_id": "income",
   "x_transform": "log",
   "x_unit": "currency (2016 $, block group median)",
   "beta": 0.131,
   "se": 0.014,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(block-group median income)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Slope",
   "taxonomy_id": "other",
   "x_transform": "log",
   "x_unit": "degrees",
   "beta": 0.019,
   "se": 0.002,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(parcel slope in degrees)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Elevation",
   "taxonomy_id": "other",
   "x_transform": "log",
   "x_unit": "m",
   "beta": -0.023,
   "se": 0.023,
   "t": null,
   "p": null,
   "p_stars": "",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(parcel elevation, metres); printed as -0.0230"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Lot Size",
   "taxonomy_id": "lot_size",
   "x_transform": "log",
   "x_unit": "sqft",
   "beta": 0.101,
   "se": 0.004,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(lot size, sq ft)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Building Age",
   "taxonomy_id": "age",
   "x_transform": "log",
   "x_unit": "years",
   "beta": -0.125,
   "se": 0.003,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(building age in years)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Building Size",
   "taxonomy_id": "living_area",
   "x_transform": "log",
   "x_unit": "sqft",
   "beta": 0.547,
   "se": 0.01,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "ln(building size, sq ft)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Quarter 2",
   "taxonomy_id": "transaction_timing",
   "x_transform": "dummy",
   "x_unit": "binary",
   "beta": 0.044,
   "se": 0.002,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "Sale quarter 2 dummy (reference quarter 1)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Quarter 3",
   "taxonomy_id": "transaction_timing",
   "x_transform": "dummy",
   "x_unit": "binary",
   "beta": 0.05,
   "se": 0.002,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "Sale quarter 3 dummy (reference quarter 1)"
  },
  {
   "model_id": "T3-c1",
   "var_name_printed": "Quarter 4",
   "taxonomy_id": "transaction_timing",
   "x_transform": "dummy",
   "x_unit": "binary",
   "beta": 0.015,
   "se": 0.002,
   "t": null,
   "p": null,
   "p_stars": "***",
   "ci_lo": null,
   "ci_hi": null,
   "page": 34,
   "confidence": "high",
   "notes": "Sale quarter 4 dummy (reference quarter 1)"
  }
 ]
}