# RECORD a7fe404df2e413395450e192cebe2f68aa921579 # TITLE: IMPACT OF ACCESS TO SUNLIGHT ON RESIDENTIAL PROPERTY VALUES: AN EMPIRICAL ANALYSIS OF THE HOUSING MARKET IN SHANGHAI # YEAR: 2022.0 VENUE: International Journal of Strategic Property Management DOI: 10.3846/ijspm.2022.18004 # AUTHORS: Y. Zhong; Jia-Jun Lu; Zhe-Han Li # PAGES: 12 CANDIDATE TABLE PAGES (1-based): [7, 8, 11, 12] # ABSTRACT: As an important environmental amenity, sunlight brings us a large number of benefits and improves the quality of our daily lives, and its welfare measurement depends on concrete living conditions. The purpose of this article is to empirically document the non-marketed value of sunlight in light of the view orientation of an apartment in the context of the housing market. Using a hedonic pricing model estimated with the real estate transaction data over 40,000 housing units in 2019–2021 in Shanghai, it is found that: (1) homeowners, on average, are willing to pay an extra 7.2% to choose the apartments with a high level of sunshine (facing south), relative to those with no direct access to sunlight (facing north); (2) the value of sunlight shrinks with pollution and becomes larger if living in a higher apartment; (3) residents living in higher units have a larger willingness to pay for the sunlight and environmental quality improvement. These empirical findings shed light on the welfare measurement of sunlight and have profound implications for the capitalization of environmental amenities reflected in housing prices. ===== PAGE 1 (score 11, numeric-paren 1, table-words 0, var-words 10) ===== Copyright © 2022 The Author(s). Published by Vilnius Gediminas Technical University This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unre- stricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Introduction Sunlight may be considered the most valuable natural re- source human beings could employ for free. It is taken more as public good than a private or club good in most cases since it provides inexhaustible power and forms a non-rivalrous situation for the usage (Engerer, 2011). That said, it is critical to put an accurate value on the sunshine since, in some cases, sunlight is still limited in availabil- ity. Then, environmental economists should pay more at- tention to evaluating access to sunlight in some specific context. A prominent example is access to sunshine for residents living at homes, especially for those in big cit- ies. In modern urban cities, residents spend more time indoors, and having direct access to sunlight is strongly preferred. Thus, the attainability of sunlight, which be- comes an important environmental amenity for citizens living in large metropolises, becomes of great worth. This goes to the main question this paper plans to answer: how much exactly do homeowners living in cities value access to sunshine. This paper empirically estimates the price premium of the access to sunshine by studying homeown- ers’ purchase behavior in the housing market of Shanghai in China. Specifically, using a hedonic pricing model, new empirical evidence of the value of sunshine is provided by investigating the relationship between the availability of sunshine in apartments and the different expenditures of staying in these housing units. The starting point relates the project to the strand of research about the hedonic pricing model. Access to sunshine should be considered one of the environmental amenities for attractive apartments. Estimating its value comes from analyzing the trade-off behavior between the availability of sunshine and the higher value it brings. Thus, it is proper to put this project into a line of research about the evaluation of the willingness to pay (WTP) to environmental amenities under the framework of the he- donic pricing method (Rosen, 1974), which is a promi- nent existing method applied in valuing the non-market good, as the sunlight here in our paper (Ready & Ab- dalla, 2005; Levinson, 2012). Among them, many studies evaluate non-marketed goods in the context of housing International Journal of Strategic Property Management ISSN: 1648-715X / eISSN: 1648-9179 2022 Volume 26 Issue 5: 385–396 https://doi.org/10.3846/ijspm.2022.18004 *Corresponding author. E-mail: lizhehan@zju.edu.cn IMPACT OF ACCESS TO SUNLIGHT ON RESIDENTIAL PROPERTY VALUES: AN EMPIRICAL ANALYSIS OF THE HOUSING MARKET IN SHANGHAI Yi ZHONG1, Jiajun LU2, Zhehan LI3,* 1 College of Economics and Management, China Jiliang University, Hangzhou, China 2 International Business School, Zhejiang University, Haining, China 3 School of Philosophy, Zhejiang University, Hangzhou, China Received 05 June 2022; accepted 03 November 2022 Abstract. As an important environmental amenity, sunlight brings us a large number of benefits and improves the quality of our daily lives, and its welfare measurement depends on concrete living conditions. The purpose of this article is to em- pirically document the non-marketed value of sunlight in light of the view orientation of an apartment in the context of the housing market. Using a hedonic pricing model estimated with the real estate transaction data over 40,000 housing units in 2019–2021 in Shanghai, it is found that: (1) homeowners, on average, are willing to pay an extra 7.2% to choose the apart- ments with a high level of sunshine (facing south), relative to those with no direct access to sunlight (facing north); (2) the value of sunlight shrinks with pollution and becomes larger if living in a higher apartment; (3) residents living in higher units have a larger willingness to pay for the sunlight and environmental quality improvement. These empirical findings shed light on the welfare measurement of sunlight and have profound implications for the capitalization of environmental amenities reflected in housing prices. Keywords: environmental amenity, value of sunshine, hedonic pricing, housing market. ===== PAGE 7 (score 87, numeric-paren 68, table-words 4, var-words 11) ===== International Journal of Strategic Property Management, 2022, 26(5): 385–396 391 The estimate is smaller than that in Lu (2018) showing that a south- facing orientation brings a 14% premium in property value. After multiplying the mean unit price of 46,712 CNY/m2 by 7.2%, the price premium on the sun- light, on average, becomes 3,363 CNY/m2 (46.32 USD/ft2) for homeowners in Shanghai.14 In addition to the view orientation, both PM2.5 and dust pollution have a negative impact on house prices. Homeowners prefer to live in a high position with a better view outside relative to lower places. Based on the non- linearity of the relative height for the house prices, an- 14 The exchange rate is $1.00 = ¥6.745 in 07/2022. other piece of empirical evidence that needs to be pointed out is that, when the relevant height of an apartment is higher, its value becomes first rises and then drops when it reaches the top of the building. It could be attributed to the structure of buildings in Shanghai. Most buildings in Shanghai are equipped with an elevator, thus making it easier for residents living on a higher level. Moreo- ver, living at the bottom is unattractive since it usually is noisier and more humid down below. However, the values of apartment located on the top of buildings are lower relatively since living too high takes more time to get down and thus is less safe in some emergency. Hence, there exists a nonlinear relationship between the relative height and house prices. Table 2. The regression results of the baseline model (1) (1) (2) (3) (4) (5) (6) (7) Dependent variable: the natural log of a house price per square meter, log (Yidct) South 0.080*** 0.066*** 0.067*** 0.071*** 0.077*** 0.072*** 0.071*** (–0.003) (–0.003) (–0.003) (–0.006) (–0.009) (–0.002) (–0.002) Rheight 2.771*** 2.732*** 2.932*** 2.551*** 2.441*** 2.516*** 2.519*** (–0.078) (–0.072) (–0.073) (–0.092) (–0.081) (–0.057) (–0.075) Rheight2 –1.251*** –1.207*** –1.133*** –1.350*** –1.523*** –1.521*** –1.516*** (–0.164) (–0.181) (–0.157) (–0.164) (–0.167) (–0.15) (–0.154) Age 0.072*** 0.067*** 0.081*** 0.075*** 0.049*** 0.025*** 0.026*** (–0.006) (–0.006) (–0.006) (–0.006) (–0.006) (–0.005) (–0.005) Area 1.020*** (–0.015) PM25 –0.023*** –0.023*** –0.108*** –0.109*** –0.112*** (–0.007) (–0.007) (–0.008) (–0.013) (–0.014) Dust –0.354*** –0.353*** –0.332*** –0.321*** –0.319*** (–0.06) (–0.06) (–0.068) (–0.061) (–0.021) Pop density 0.910*** 0.935*** 0.833*** 0.831*** (–0.137) (–0.143) (–0.138) (–0.136) Factory –0.060** –0.022 –0.113** –0.121** (–0.029) (–0.021) (–0.05) (–0.05) School 0.754*** 1.362*** 1.216*** 1.218*** (–0.161) (–0.163) (–0.156) (–0.161) Shopping 0.573*** 1.123*** 0.234* 0.241* (–0.139) (–0.139) (–0.134) (–0.122) Hospital 2.014*** 0.284 3.411*** 3.419*** (–0.46) (–0.479) (–0.452) (–0.422) Greenspace 0.004*** 0.005** 0.006*** 0.006*** (–0.001) (–0.001) (–0.002) (–0.002) Constant –1.193*** 1.339*** –1.388*** –1.354*** –2.134*** –2.819*** –0.291*** (–0.171) (–0.206) (–0.498) (–0.729) (–0.194) (–0.129) (–0.012) District FE Y Y N N N N N Community FE N N N Y Y Y Y Year FE Y Y Y Y Y Y Y N 40,448 40,448 40,448 40,448 40,448 40,448 40,448 Adjusted R2 0.239 0.239 0.234 0.372 0.355 0.479 0.421 Note: To control for the potential serial correction with a district, robust standard errors in parentheses are clustered at the district level. For the ro- bustness check, we put area as one of the control variables in column (7), which shows the similar results as before. Thus, we will mainly focus on the unit price as dependent variable. *** p < 0.01, ** p < 0.05, * p < 0.1. ===== PAGE 8 (score 49, numeric-paren 22, table-words 9, var-words 9) ===== 392 Y. Zhong et al. Impact of access to sunlight on residential property values: an empirical analysis... 4.2. Extended models Built upon the baseline model, the hedonic estimation is extended by incorporating the interaction terms to allow varying marginal effects and other complexities. Table 3 shows the regression results of the extended model (2).15 The coefficient on Dust × South is significantly negative. Given the positive sign of South, it confirms the previ- ous presumption that the value from having an advanta- geous orientation shrinks with dust pollution. Based on the empirical results about the interaction term Rheight × South, the positive relation between the marginal effect of facing south and relative height provides significant evi- dence that the availability and hedonic value of sunshine could be magnified by the height of an apartment. As for the interaction between air pollution and relative height, the empirical evidence indicates that the height would alleviate the negative influence of both PM2.5 and dust pollution on the house prices. It implies that, if you stay in a very high apartment, you are still able to see miles away from where you stand even on heavily polluted days. Dust pollution has a less significant influence than PM2.5 on high apartments. Since the PM2.5 pollution is almost invisible by our naked eyes, its impact on house prices should be identical across the heights. Due to the negative sign of the coefficient on dust pollution in the baseline model before, the positive coefficient of the interaction term makes the total coefficient less negative, resulting in a smaller marginal effect. Given the ambiguity of the direction of the influence of Rheight × Orientation × Airpollution on the house prices, two presumptions are provided in the analysis. The first presumption is that, as pollution gets more serious, the value of access to sunshine declines (Zhang et al., 2020). It is proper to take the first two items, Rheighti × Southi, as the comprehensive indicator of measuring the availability of sunshine. We examine how the comprehensive indicator interacts with air pollution and how it changes the house price given different levels of air pollution. The other pro- posed presumption is that residents living in more expen- sive apartments are supposed to care more about environ- mental quality and thus be more responsive to air pollution (Tu et al., 2020). Figure 3 graphically outlines the spatial heterogeneity. Empirically, house prices are higher for those being higher and facing south. People living in section A would have to pay more to purchase the apartment and are more likely to be rich relative to those living in other sec- tions. As people get wealthier, they are willing to pay more to reduce the air pollution (Chay & Greenstone, 2005). Therefore, residents in section A would be more concerned about air pollution. As a result, the negative marginal effect of air pollution would be larger for them, which is reflected in the larger price elasticity to air pollution. However, from 15 Due to the limited space, only the estimates on variables of interest are shown here, and the complete regression results of the extended model (2) are presented in Table A2 in Ap- pendix. Table 3. The regression results of the extended model (2) (1) (2) (3) (4) Dependent variable: house price per square meter, log (Yidct) Rheight × South 0.327*** 0.294*** (0.015) (0.015) Rheight × Dust 0.024*** 0.021*** (0.008) (0.009) Rheight × PM25 0.031*** 0.029*** (0.006) (0.007) Dust × South –0.352*** –0.323*** (0.074) (0.064) PM25 × South –0.219*** –0.319*** (0.065) (0.064) Rheight × South × Dust –0.006 (0.007) Rheight × South × PM25 –0.004 (0.006) Community FE Y Y Y Y Year FE Y Y Y Y N 40,448 40,448 40,448 40,448 Adjusted R2 0.644 0.643 0.641 0.642 Note: To control for the potential serial correction with a district, ro- bust standard errors in parentheses are clustered at the district level. *** p < 0.01, ** p < 0.05, * p < 0.1. A C B D North South Figure 3. Representation of the orientation and relative height the empirical results, we cannot actually see any clear and significant relationship. It might be the case that two types of influence coexist simultaneously and impact the house prices in the opposite ways. Conclusions This paper documents the relationship between the view orientation of dwelling units and their property values and empirically estimate the nonmarket value of sun- light in the Shanghai housing market under a hedonic pricing framework. Using the real estate transaction data of over 40,000 housing units in 2019–2021, empiri- cal results suggest that, other factors being equal, home- ===== PAGE 9 (score 14, numeric-paren 0, table-words 0, var-words 14) ===== International Journal of Strategic Property Management, 2022, 26(5): 385–396 393 owners in Shanghai, on average, are willing to pay extra 3,363 CNY/m2 (46.32 USD/ft2) to choose the apartments with sufficient sunlight and orientation facing south, smaller than that in Lu (2018) showing that a south-facing orientation brings a 14% premium in property value. The value of sunlight becomes larger with relative height, sug- gesting that people living in higher apartments are will- ing to pay more for south-facing apartments rather than ones in other orientations. It is also found that the price premium of sunlight shrinks with pollution and that dust pollution has a less significant influence than PM2.5 on higher apartments. Moreover, we find that, according to the empirical results of three-variable interactions, people living in high apartments facing the south have a slightly larger willingness to pay for the sunlight if the air quality is improved. On top of the new findings, there might exist some potential for further improvement in this paper. The es- timated value of sunlight potentially gets entangled with the price premium of Geomancy. Admittedly, due to the lack of data on real-time apartment-specific sunlight in- tensity, the premium effect caused by sunlight is insepa- rable from that of Geomancy. However, as suggested in the literature review, these studies have found little, if any, solid evidence showing the empirical importance of Geomancy compared to another more significant benefit, sunlight. This makes the issue much less worrying, and the estimates are just slightly upward biased if any. Moreo- ver, exploring the heterogeneity of sunlight’s value by air pollution and relative height could provide the unbiased estimated marginal value of sunlight since the value of Geomancy is not very likely to vary by them. Thus, we could take the estimates of south-facing orientation as the upper bound of the estimated value of sunlight. Sunlight brings us a large number of benefits and im- proves the quality of our daily lives, and its welfare meas- urement depends on concrete living conditions. During the ongoing COVID-19 pandemic, many residents in Shanghai have to stay indoors due to a lockdown and thus need sunlight more than ever. Such an unusual scenario could raise the value of sunlight and reinforces its impor- tance for potential homeowners in the housing market. Furthermore, real estate developers would also find the estimates useful since they need them to help develop the best pricing strategy based on the apartment attributes. Lastly, understanding the hedonic value of different view orientations and their interaction with different environ- mental and urban amenities is also important for a wide range of city planning purposes. This paper sheds light on the welfare measurement of sunlight and has profound implications for the capitalization of environmental amen- ities reflected in housing prices. Acknowledgements Authors acknowledge the financial support from the Zhe- jiang Provincial Philosophy and Social Sciences Planning Project. Funding This work was supported by Zhejiang Provincial Philoso- phy and Social Sciences Planning Project (23NDJC078YB). Author contributions Y. Zhong carried out the conceptualization and methodol- ogy. J. Lu finished the original draft preparation and writ- ing, as well as the funding acquisition. Z. Li conducted the review and editing of the manuscript. All authors read and approved the final manuscript. Disclosure statement The authors declare no potential conflicts of interest with respect to the research, authorship, and publication of this article. This article does not contain any studies involving human participants performed by any of the authors. References Berger, M. C., Blomquist, G. C., & Peter, K. S. (2008). Compen- sating differentials in emerging labor and housing markets: estimates of quality of life in Russian cities. Journal of Urban Economics, 63(1), 25–55. https://doi.org/10.1016/j.jue.2007.01.006 Chan, E., Yim Yiu, C., Baldwin, A., & Lee, G. (2009). Value of buildings with design features for healthy living: a contingent valuation approach. Facilities, 27(5/6), 229–249. https://doi.org/10.1108/02632770910944952 Chay, K. Y., & Greenstone, M. (2005). Does air quality matter? Evidence from the housing market. Journal of Political Econ- omy, 113(2), 376–424. https://doi.org/10.1086/427462 Chen, Y., Ebenstein, A., Greenstone, M., & Li, H. (2013). Evi- dence on the impact of sustained exposure to air pollution on life expectancy from China’s Huai River policy. Proceedings of the National Academy of Sciences, 110(32), 12936–12941. https://doi.org/10.1073/pnas.1300018110 Des Rosiers, F., Bolduc, A., & Thériault, M. (1999). Environment and value Does drinking water quality affect house prices? Journal of Property Investment & Finance, 17(5), 444–463. https://doi.org/10.1108/14635789910294877 Engerer, H. (2011). Security as a public, private or club good: some fundamental considerations. Defence and Peace Economics, 22(2), 135–145. https://doi.org/10.1080/10242694.2011.542333 Faux, J., & Perry, G. M. (1999). Estimating irrigation water value using hedonic price analysis: a case study in Malheur County, Oregon. Land Economics, 75(3), 440–452. https://doi.org/10.2307/3147189 Guntermann, K. L., & Norrbin, S. (1987). Explaining the vari- ability of apartment rents. Real Estate Economics, 15(4), 321– 340. https://doi.org/10.1111/1540-6229.00435 Guven, C. (2012). Reversing the question: does happiness affect consumption and savings behavior? Journal of Economic Psy- chology, 33(4), 701–717. https://doi.org/10.1016/j.joep.2012.01.002 Harrison, D., & Rubinfeld, D. L. (1978). Hedonic housing prices and the demand for clean air. Journal of Environmental Eco- nomics and Management, 5(1), 81–102. https://doi.org/10.1016/0095-0696(78)90006-2 ===== PAGE 11 (score 90, numeric-paren 78, table-words 3, var-words 6) ===== International Journal of Strategic Property Management, 2022, 26(5): 385–396 395 Variable Definition and explanation Data source Air quality Dust pollution Weight of dust pollution, in unit of ton per square kilometer SEPB PM2.5 pollution Concentration of PM2.5 pollution, in unit of milligram per cubic meter SEPB Weather Temperature The city’s average temperature in Fahrenheit on a daily basis NOAA Dew point The city’s average dew point in Fahrenheit on a daily basis NOAA Sea level pressure The city’s average pressure in hPa on a daily basis NOAA Humidity Daily likelihood of precipitation (%) NOAA Wind Daily average wind speed, miles per hour (MPH) NOAA Sunny day The number of sunny days in a given period NOAA Urban spatial structure District There are a total of 16 districts in the city and my sample data cover 15 of them SBS Subdistrict There are a total of 214 subdistricts in the city SBS View Discrete variable that indicates how many attractions one unit could have the views of SMTA Distance The linear distance in meters between attraction and unit. It becomes average distance if it has several views SMTA Table A2. The complete regression results of the extended model (2) (1) (2) (3) (4) Dependent variable: house price per square meter, log (Yidct) South 0.067*** 0.071*** 0.077*** 0.072*** (0.003) (0.006) (0.009) (0.002) Rheight South 0.327*** 0.294*** (0.015) (0.015) Rheight × Dust 0.024*** 0.021*** (0.008) (0.009) Rheight × PM25 0.031*** 0.029*** (0.006) (0.007) Dust × South –0.352*** –0.323*** (0.074) (0.064) PM25 × South –0.219*** –0.319*** (0.065) (0.064) Rheight × South × Dust –0.006 (0.007) Rheight × South × PM25 –0.004 (0.006) Rheight 1.932*** 1.552*** 1.433*** 1.522*** (0.073) (0.092) (0.076) (0.061) Rheight2 –1.133*** –1.350*** –1.531*** –1.532*** (0.157) (0.164) (0.167) (0.150) Age 0.081*** 0.072*** 0.047*** 0.026*** (0.006) (0.006) (0.006) (0.005) PM25 –0.023*** –0.108*** –0.111*** –0.121*** (0.006) (0.007) (0.008) (0.013) Dust –0.354*** –0.353*** –0.331*** –0.323*** (0.060) (0.060) (0.068) (0.061) Pop density 0.807*** 0.914*** 0.932*** 0.831*** (0.124) (0.137) (0.143) (0.138) End of Table A1 ===== PAGE 12 (score 46, numeric-paren 38, table-words 2, var-words 4) ===== 396 Y. Zhong et al. Impact of access to sunlight on residential property values: an empirical analysis... (1) (2) (3) (4) Factory –0.030*** –0.061** –0.024 –0.121** (0.009) (0.029) (0.021) (0.050) School 0.643*** 0.751*** 1.359*** 1.221*** (0.034) (0.161) (0.163) (0.156) Shopping 0.235*** 0.573*** 1.132*** 0.241* (0.131) (0.141) (0.139) (0.134) Hospital 1.743*** 2.014*** 0.256 3.411*** (0.455) (0.460) (0.479) (0.452) Greenspace 0.003* 0.004*** 0.005** 0.006*** (0.002) (0.001) (0.001) (0.002) Community FE Y Y Y Y Year FE Y Y Y Y N 40,448 40,448 40,448 40,448 Adjusted R2 0.644 0.643 0.641 0.642 Note: To control for the potential serial correction with a district, robust standard errors in parentheses are clustered at the district level. *** p < 0.01, ** p < 0.05, * p < 0.1. End of Table A2