共 50 条
- [1] The economic impact of greening urban vacant land: a spatial difference-in-differences analysis [J]. ENVIRONMENT AND PLANNING A-ECONOMY AND SPACE, 2012, 44 (12): : 3010 - 3027
- [7] Impact of Refugees on Local Health Systems: A Difference-in-Differences Analysis in Cameroon [J]. PLOS ONE, 2016, 11 (12):