Geographical stratification of urban green areas in European cities
研究了居民对绿地大小和可达性有偏好时，城市绿地数量与到市中心距离的非单调关系，并利用欧洲300个最大城市的数据验证了这一理论预测。
Abstract This article studies the provision of urban green areas in cities where residents have preferences for the size of and access to those areas. At the optimum, the number of urban green spaces is a nonmonotone function of distance to the city center, while the sizes and distances to other urban green areas increase as one moves to the urban fringe. This article empirically investigates those properties for the 300 largest European cities by using the Global Monitoring Environment Services Urban Atlas database (European Environmental Agency). The empirical analysis confirms the nonmonotone relationship between the number of urban green spaces and the distance to the city center. The distance between two parks also increases as one moves toward the urban fringe.