We examined the impact of diesel emission regulations on air quality, land prices, and infant health in the Tokyo metropolitan area. The results reveal that as air pollution concentrations improved, land prices increased more in areas with higher diesel vehicle traffic, even after controlling for non-regulated vehicle traffic. In contrast, the concentrations of non-regulated air pollutants were unaffected. Estimates based on the hedonic approach show that the benefit of air quality improvement in the metropolitan area is about 14 times the cost. Improved air quality also improved infant health. The improvement in infant mortality with a one-unit improvement in suspended particulate matter was similar in magnitude to published results from the United States.

中文翻译：

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柴油排放法规的好处：来自世界上最大的低排放区的证据

我们研究了柴油排放法规对东京都市区空气质量、土地价格和婴儿健康的影响。结果显示，随着空气污染浓度的改善，即使在控制非管制车辆交通之后，柴油车交通量较高的地区的土地价格也会上涨更多。相比之下，非管制空气污染物的浓度则不受影响。基于享乐法的估算表明，大都市区空气质量改善的效益约为成本的14倍。空气质量的改善也改善了婴儿的健康。悬浮颗粒物每改善一个单位，婴儿死亡率的改善程度与美国公布的结果相似。