difference-in-difference相关论文
目的评估深圳市采用入校接种方式以及学龄儿童流感疫苗接种率高低对缺课的影响。方法以深圳市小学学龄儿童为研究对象,利用2017年12......
Does the Belt and Road Initiative Increase the Carbon Emission Intensity of Participating Countries?
The impact that the Belt and Road Initiative (BRI) has had on carbon emissions is a hotly debated issue.Using a panel da......
随着美国对中国产品的贸易保护措施从最初的单纯反倾销到其后的反补贴、再到最近的反倾销和反补贴并用,中美贸易的自由发展受到了......