1{2 "record_id": "8fb41eefcd89b6d6746d9ab5af9f6f61e2da05b2",3 "eligible": true,4 "exclusion_reason": null,5 "study": {6 "title": "Spatial Heterogeneity in Hedonic Price Effects for Lake Water Quality",7 "year": 2023,8 "doi": "10.3368/le.100.1.102122-0086r",9 "country": "United States",10 "region_city": "Contiguous United States (national model; properties within 1,000 m of lakes > 4 ha)",11 "sample_start": null,12 "sample_end": null,13 "property_type": "single_family",14 "price_type": "transaction",15 "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",16 "document_type": "journal",17 "estimators": [18 "OLS"19 ],20 "spatial_method": "census tract x year fixed effects; state and ecoregion interactions with water quality",21 "time_fe": true,22 "location_fe": true,23 "se_type": "clustered",24 "n_obs_total": 485860,25 "ai_methods": [],26 "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)."27 },28 "models": [29 {30 "model_id": "T3-c1",31 "table": "3",32 "column": "Estimate",33 "page": 34,34 "dep_var": "ln(sale price, 2020 $)",35 "dep_transform": "log",36 "estimator": "OLS",37 "n_obs": 485860,38 "r2": null,39 "se_or_t_in_parentheses": "se",40 "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"41 }42 ],43 "coefficients": [44 {45 "model_id": "T3-c1",46 "var_name_printed": "Secchi",47 "taxonomy_id": "water_quality",48 "x_transform": "log",49 "x_unit": "m (Secchi depth)",50 "beta": 0.231,51 "se": 0.034,52 "t": null,53 "p": null,54 "p_stars": "***",55 "ci_lo": null,56 "ci_hi": null,57 "page": 34,58 "confidence": "high",59 "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"60 },61 {62 "model_id": "T3-c1",63 "var_name_printed": "<150 m",64 "taxonomy_id": "water_proximity",65 "x_transform": "binary",66 "x_unit": "binary",67 "beta": 0.124,68 "se": 0.009,69 "t": null,70 "p": null,71 "p_stars": "***",72 "ci_lo": null,73 "ci_hi": null,74 "page": 34,75 "confidence": "high",76 "notes": "Lakefront buffer dummy: property within 150 m of the lake =1"77 },78 {79 "model_id": "T3-c1",80 "var_name_printed": "Lake Distance",81 "taxonomy_id": "water_proximity",82 "x_transform": "log",83 "x_unit": "m",84 "beta": -0.095,85 "se": 0.005,86 "t": null,87 "p": null,88 "p_stars": "***",89 "ci_lo": null,90 "ci_hi": null,91 "page": 34,92 "confidence": "high",93 "notes": "ln(distance from property to nearest lake, metres)"94 },95 {96 "model_id": "T3-c1",97 "var_name_printed": "Lake Area",98 "taxonomy_id": "other",99 "x_transform": "log",100 "x_unit": "ha",101 "beta": 0.013,102 "se": 0.005,103 "t": null,104 "p": null,105 "p_stars": "*",106 "ci_lo": null,107 "ci_hi": null,108 "page": 34,109 "confidence": "high",110 "notes": "ln(lake surface area, hectares), not demeaned as a control"111 },112 {113 "model_id": "T3-c1",114 "var_name_printed": "Median Income",115 "taxonomy_id": "income",116 "x_transform": "log",117 "x_unit": "currency (2016 $, block group median)",118 "beta": 0.131,119 "se": 0.014,120 "t": null,121 "p": null,122 "p_stars": "***",123 "ci_lo": null,124 "ci_hi": null,125 "page": 34,126 "confidence": "high",127 "notes": "ln(block-group median income)"128 },129 {130 "model_id": "T3-c1",131 "var_name_printed": "Slope",132 "taxonomy_id": "other",133 "x_transform": "log",134 "x_unit": "degrees",135 "beta": 0.019,136 "se": 0.002,137 "t": null,138 "p": null,139 "p_stars": "***",140 "ci_lo": null,141 "ci_hi": null,142 "page": 34,143 "confidence": "high",144 "notes": "ln(parcel slope in degrees)"145 },146 {147 "model_id": "T3-c1",148 "var_name_printed": "Elevation",149 "taxonomy_id": "other",150 "x_transform": "log",151 "x_unit": "m",152 "beta": -0.023,153 "se": 0.023,154 "t": null,155 "p": null,156 "p_stars": "",157 "ci_lo": null,158 "ci_hi": null,159 "page": 34,160 "confidence": "high",161 "notes": "ln(parcel elevation, metres); printed as -0.0230"162 },163 {164 "model_id": "T3-c1",165 "var_name_printed": "Lot Size",166 "taxonomy_id": "lot_size",167 "x_transform": "log",168 "x_unit": "sqft",169 "beta": 0.101,170 "se": 0.004,171 "t": null,172 "p": null,173 "p_stars": "***",174 "ci_lo": null,175 "ci_hi": null,176 "page": 34,177 "confidence": "high",178 "notes": "ln(lot size, sq ft)"179 },180 {181 "model_id": "T3-c1",182 "var_name_printed": "Building Age",183 "taxonomy_id": "age",184 "x_transform": "log",185 "x_unit": "years",186 "beta": -0.125,187 "se": 0.003,188 "t": null,189 "p": null,190 "p_stars": "***",191 "ci_lo": null,192 "ci_hi": null,193 "page": 34,194 "confidence": "high",195 "notes": "ln(building age in years)"196 },197 {198 "model_id": "T3-c1",199 "var_name_printed": "Building Size",200 "taxonomy_id": "living_area",201 "x_transform": "log",202 "x_unit": "sqft",203 "beta": 0.547,204 "se": 0.01,205 "t": null,206 "p": null,207 "p_stars": "***",208 "ci_lo": null,209 "ci_hi": null,210 "page": 34,211 "confidence": "high",212 "notes": "ln(building size, sq ft)"213 },214 {215 "model_id": "T3-c1",216 "var_name_printed": "Quarter 2",217 "taxonomy_id": "transaction_timing",218 "x_transform": "dummy",219 "x_unit": "binary",220 "beta": 0.044,221 "se": 0.002,222 "t": null,223 "p": null,224 "p_stars": "***",225 "ci_lo": null,226 "ci_hi": null,227 "page": 34,228 "confidence": "high",229 "notes": "Sale quarter 2 dummy (reference quarter 1)"230 },231 {232 "model_id": "T3-c1",233 "var_name_printed": "Quarter 3",234 "taxonomy_id": "transaction_timing",235 "x_transform": "dummy",236 "x_unit": "binary",237 "beta": 0.05,238 "se": 0.002,239 "t": null,240 "p": null,241 "p_stars": "***",242 "ci_lo": null,243 "ci_hi": null,244 "page": 34,245 "confidence": "high",246 "notes": "Sale quarter 3 dummy (reference quarter 1)"247 },248 {249 "model_id": "T3-c1",250 "var_name_printed": "Quarter 4",251 "taxonomy_id": "transaction_timing",252 "x_transform": "dummy",253 "x_unit": "binary",254 "beta": 0.015,255 "se": 0.002,256 "t": null,257 "p": null,258 "p_stars": "***",259 "ci_lo": null,260 "ci_hi": null,261 "page": 34,262 "confidence": "high",263 "notes": "Sale quarter 4 dummy (reference quarter 1)"264 }265 ]266}