空气质量对商品房价格的影响研究

Research on the Influence of Air Quality on the Commercial Housing Price

本文选取2010~2018年全国289个城市的空气质量和商品房销售价格等数据,通过构建特征价格模型,研究空气质量改善对商品房价格的影响,进而估算购房者愿意为清洁空气买单的边际支付意愿。本文研究发现,PM2.5浓度对住宅商品房销售价格有显著负向影响,PM2.5浓度每下降一个百分点,住宅商品房价格会随之上升0.11%,对应计算出清洁空气的经济价值为14.22元/m2。而且发现空气污染对房价的影响存在区域异质性,在中部地区、低房价地区、低人口密度地区,PM2.5对住宅商品房销售价格的负向抑制作用明显更强。通过中介效应检验进一步深入探究其影响机制,发现PM2.5可以通过影响城市人口规模渠道负向抑制住宅商品房销售价格。

This paper selects data on air quality and commercial housing sales prices in 289 cities across the country from 2010 to 2018, and builds a hedonic price model to study the impact of air quality im-provement on commercial housing prices, and then estimates the marginal payment that buyers are willing to pay for clean air willingness. This paper found that the concentration of PM2.5 has a significant negative impact on the sales price of residential commercial houses. For every one per-centage point decrease in the concentration of PM2.5, the price of residential commercial houses will increase by 0.11%. The economic value of clean air is calculated to be 14.22 ¥/m2. In addition, the impact of air pollution on housing prices has regional heterogeneity. In low-central areas, low-price areas, and low-population areas, the negative inhibitory effect of PM2.5 on the sales prices of residential commercial houses is significantly stronger. Through the intermediary effect test to further explore its influence mechanism, it is found that PM2.5 can negatively inhibit the sales price of residential commercial houses through the channel that affects the size of the urban population.