# RECORD 620cbd7217ca28bcea726920009e42496a17ea8b # TITLE: The Impact of Brownfields on Residential Property Values in Cincinnati, Ohio: A Spatial Hedonic Approach # YEAR: 2012.0 VENUE: Journal of Regional Analysis & Policy DOI: 10.68479/001c.7941 # AUTHORS: Oana Mihaescu; Rainer Vom Hofe # PAGES: 14 CANDIDATE TABLE PAGES (1-based): [9] # ABSTRACT: This paper empirically assesses the impact brownfield sites have on market values of single-family residential properties. Using three different hedonic model specifications, Ordinary Least Squares and Spatial Autoregressive and Spatial Error Models, this study shows that properties located less than 1,000 feet from a brownfield site experience a significant depreciation in property values. As expected, spatial dependence among real estate property values is present, meaning that the two spatial hedonic model specifications are superior to the Ordinary Least Squares specification. The study contributes to the relevant real estate and urban economics literature by determining the negative impact brownfield sites have on the value of single-family residential properties in our study region in Cincinnati, Ohio, by explicitly accounting for the phenomenon of spatial dependence in the dependent variable and by addressing the declining influence of brownfield sites on property values in a nonlinear relationship ===== PAGE 1 (score 10, numeric-paren 0, table-words 1, var-words 8) ===== The Impact of Brownfields on Residential Property Values in Cincinnati, Ohio: A Spatial Hedonic Approach Oana Mihaescu and Rainer vom Hofe School of Planning, University of Cincinnati – USA Abstract. This paper empirically assesses the impact brownfield sites have on market values of single-family residential properties. Using three different hedonic model specifications, Ordi- nary Least Squares and Spatial Autoregressive and Spatial Error Models, this study shows that properties located less than 1,000 feet from a brownfield site experience a significant de- preciation in property values. As expected, spatial dependence among real estate property values is present, meaning that the two spatial hedonic model specifications are superior to the Ordinary Least Squares specification. The study contributes to the relevant real estate and urban economics literature by determining the negative impact brownfield sites have on the value of single-family residential properties in our study region in Cincinnati, Ohio, by explic- itly accounting for the phenomenon of spatial dependence in the dependent variable and by addressing the declining influence of brownfield sites on property values in a nonlinear relationship. 1. Introduction Brownfield sites (or simply brownfields) are abandoned, idled, or underused real properties that are currently or were formerly employed for indus- trial or commercial purposes and whose expansion, redevelopment, or reuse may be complicated by the presence or potential presence of a hazardous sub- stance, pollutant, or contaminant (Braswell, 1999; Bacot and O'Dell, 2006; US EPA, 2009, among oth- ers). Contaminated properties yield little revenue for local governments. They are unsafe for ecosys- tems and human health and impair the neighbor- hoods that contain them, both socially and aestheti- cally. In addition, they negatively impact the hous- ing prices of residential properties that are located in close proximity (Bromberg and Spiesman, 2006). It comes as no surprise that a large number of studies have strived to understand the benefits of brownfield redevelopment. Attoh-Okine and Gib- bons (2001), Amekudzi et al. (2003), and Barnett (2006), for instance, focused on the revitalization of inner city neighborhoods through housing, jobs, and tax revenues resulting from brownfield redevelop- ment. In an environmentally-oriented regional level study, Alberini et al. (2005) argued that redevelop- ing brownfields helps to reduce the harmful effects of the site's groundwater, water, soil, and/or air pol- lution on ecological systems as well as on human health1. Akinmoladun and Lewis (1998) and Attoh- Okine and Gibbons (2001) emphasize the im- portance of brownfield redevelopment for combat- ing the negative environmental effects of urban sprawl. Amekudzi et al. (2003) studied the effects of infill development to address urban sprawl. Gist (1999), Amekudzi et al. (2003), and Bacot and O'Dell (2006) focused on the impacts that redevelopment of contaminated properties has on neighborhoods and their citizens. In this study, we use the spatial hedonic pricing framework to empirically estimate the impacts 1 See also Bartsch, 1997; Attoh-Okine and Gibbons, 2001; Bacot and O'Dell, 2006. JRAP 42(3): 223-236. © 2012 MCRSA. All rights reserved. ===== PAGE 9 (score 122, numeric-paren 86, table-words 10, var-words 16) ===== Spatial Hedonic Analysis of Brownfield Impact on Property Values 231 variables remained in the final model specifications. Among others, the total finished square footage of the house (HOUSESQFT) and the total number of rooms (TOTALROOMS) were highly correlated with the other structural variables and were therefore removed from the model. Though multicollinearity may not reduce the usefulness of the model as a whole, it does have severe consequences for the in- terpretation of the marginal effects of individual re- gression coefficients (Chatterjee and Hadi, 2006), for example, the effect of the distance of residential properties on nearby brownfield sites (DISTBR). The problem of ambiguous regression results has been avoided by removing some of the severely cor- related explanatory variables, while keeping almost all of the important and relevant variables in the model. In addition, for reasons of parsimony the median household income by ZIP code (MEDHHINC) and the distance to the CBD (DISTCBD) variables were removed due to statistically insignificant parame- ters. Of the remaining fifteen variables, all calculat- ed coefficients have the expected sign, an indication that no severe multicollinearity problems are pre- sent (see Table 4). Based on the Breusch-Pagan test, we reject the null hypothesis of homoskedastic error at the 99% level of confidence for both spatial mod- els. This is a commonly observed and documented phenomenon of spatial regression models. Table 4. Estimation results for OLS, SAR, and SEM model specifications. OLS SAR SEM Variable Coefficient p-value Coefficient p-value Coefficient p-value Constant 10.51091** (0.000) 10.42543** (0.000) 10.55953** (0.000) AREALOT 3.7870E-06** (0.003) 3.3899E-06** (0.007) 4.82604E-06** (0.001) FRONT 8.7561E-06** (0.001) 1.0600E-05** (0.000) 7.42170E-06** (0.003) ATTIC 0.00014 (0.067) 0.00013 (0.098) 0.00014 (0.065) BEDROOMS 0.08504** (0.000) 0.08581** (0.000) 0.07047** (0.000) FULLBATHS 0.15120** (0.000) 0.16015** (0.000) 0.14032** (0.000) HALFBATHS 0.10480** (0.002) 0.11255** (0.000) 0.10348** (0.001) AGE -0.00698** (0.000) -0.00672** (0.000) -0.00643** (0.000) GARAGE 0.12720** (0.000) 0.12730** (0.000) 0.12189** (0.000) FIREPLACES 0.23866** (0.000) 0.23163** (0.000) 0.20293** (0.000) CVPOOR -0.83248** (0.000) -0.80300** (0.000) -0.86721** (0.000) AIRCOND 0.36702** (0.000) 0.35357** (0.000) 0.28278** (0.000) HEATING 0.31162 (0.062) 0.26759 (0.107) 0.31981* (0.035) EDUCATION 0.01346** (0.000) 0.01360** (0.000) 0.01346** (0.000) EXP-DISTBR -0.22867* (0.026) -0.22844* (0.025) -0.25361* (0.030) DISTHW -6.6047E-06* (0.017) -5.6457E-06* (0.041) -6.7431E-06* (0.029) ߩ 0.01007** (0.001) ߣ 0.32641** (0.000) ** significant at the 99% confidence level; * significant at the 95% confidence level. The univariate global Moran's I test statistic of 0.4919 is statistically significant at the 99% level (p-value = 0.001), which indicates the presence of spatial dependence in housing prices. This is ex- pected, as the price of a residential property is not solely determined through an array of housing and neighborhood characteristics, but also depends on the prices of neighboring properties. As for the OLS estimators, they are biased and inconsistent in the presence of spatial correlation. Accordingly, the discussion of our regression results will focus on the spatial model specifications. The presence of spatial dependence is further supported as the additional spatial parameters ߩ = 0.01007 and ߣ = 0.32641 in the SAR and SEM specifications are both statistically significant at the 99% level (Table 4). The relatively low ߩ value further implies that, though highly sig- nificant, the spatial spill-over effect of neighboring residential properties is relatively small. This find- ing can be explained by the fact that residential properties around brownfield sites do not show large variations in their values. Our sample data indicate that 80% of the property values fall between $30,464 and $163,800, compared to $67,500 to $319,970 citywide. As a matter of fact, most proper- ties included in our study lie in the Mill Creek ===== PAGE 10 (score 33, numeric-paren 0, table-words 6, var-words 21) ===== 232 Mihaescu and vom Hofe Corridor, an old and depressed industrial area known for its low property values. The fact that the SAR specification contains a spatial lag of the dependent variable requires an ad- ditional step to allow interpretation of the coeffi- cients from the model. We follow LeSage and Pace (2009), who suggest estimating the summary measures of the total impacts of each explanatory variable on property values as: ߚ்ൌሺ1 െߩሻିଵߚ (7) The estimated total impacts are shown in Table 5 below. Table 5. Calculated total SAR impacts. Variable Estimated SAR coefficients Total SAR impacts Constant 10.42543 10.53148 AREALOT 3.3899E-06 3.4244E-06 FRONT 1.0600E-05 1.0708E-05 ATTIC 0.00013 0.00014 BEDROOMS 0.08581 0.08668 FULLBATHS 0.16015 0.16178 HALFBATHS 0.11255 0.11369 AGE -0.00672 -0.00679 GARAGE 0.12730 0.12860 FIREPLACES 0.23163 0.23399 CVPOOR -0.80300 -0.81117 AIRCOND 0.35357 0.35717 HEATING 0.26759 0.27031 EDUCATION 0.01360 0.01374 EXP-DISTBR -0.22844 -0.23076 DISTHW -5.6457E-06 -5.7031E-06 Most of the variables in each of the three model specifications are statistically significant at the 99% level of confidence. The exception is the attic square footage (ATTIC) variable, which is only significant at the 10% level in each of the three models. Further, the presence of a heating system (HEATING) ap- pears to be significant at the 95% level in only the SEM model specification. In addition, both distance measures, i.e., distance to brownfield sites and highways, are significant at the 95% level as well. The interpretation of the spatial dependence in the SAR specification is a structural process, based on the assumption of omitted variables (LeSage and Pace, 2009). As such, the SAR approach does ac- count to some extent for these unobservable latent influences, such as noise and crime issues and other excluded variables. The total SAR impacts in Table 5 show that one additional bedroom adds 8.67% to the market value of a house, while a full bath and a half bath add 16.18% and 11.37%, respectively. Hav- ing a central air conditioning system increases the property value by 35.72%, while a heating system adds 27.03% and a garage adds 12.86%. As expected, the age of the property and educational attainment level of the residents impact residential property prices to a lesser extent. An increase in the age of the house by one year causes a decrease in the property value by only 0.68%, and a 1% increase of the population aged 25 or older holding a bachelor's degree or higher by ZIP code increases the property values by 1.37%. Also of note is that properties in very poor and unlivable condition are devalued by 81.12%. The total estimated impact with respect to the distance from a property to its closest brownfield is -0.2308. Relying on a non-linear distance function, as shown in Figure 2, means that the estimated decrease in property value with respect to the distance to the closest brownfield site needs to be calculated using the exponential form ݂ሺ݀݅ݏݐܾݎሻൌ݁ݔ݌ሺି೏೔ೞ೟್ೝ ఱబబሻ%, where distbr denotes the distance to the closest brownfield in feet. Referring to Figure 2 we see that decreasing the maximum distance allowed to a brownfield site, i.e., from 1,000 to 0 feet in our study, is equivalent to a reduction of the exponential function of ݁ݔ݌ሺିଵ଴଴଴/ହ଴଴ሻ to ݁ݔ݌ሺି଴/ହ଴଴ሻ, which is equivalent to a reduction from 0.1353 to 1.00 on the vertical axis. This translates into a maximum possible reduction in property value of ሺ1 െ0.1353ሻ∗23.08% or 19.96%. In other words, given that the maximum change in the explanatory variable is ሺ1 െ0.1353ሻൌ 0.8647, the largest change possible in a residential property value is 19.96%. The relationship between selected changes in actual distances in feet to the closest brownfield site, the equivalent changes in the exponential function, and the reductions in property values are shown in Table 6 below. As indicated in Table 6, reducing the distance from 500 to 0 feet results in a decrease of residential property values of 14.59%. Analogously, reducing the distances from 1,000 to 500 feet, from 500 to 100 feet, and from 100 to 0 feet result in property value reductions of 5.37%, 10.40%, and 4.18%, respectively. As indicated in Figure 2, the largest change in prop- erty values occurs in close proximity to the brown- field sites, while reductions in property values level off when moving beyond the 1,000 feet cut-off dis- tance used in our study. For instance, reducing the