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Did Pakistan Just Choose India Over China The Trade Numbers Tell A Story - 1xup5m1
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Did Pakistan Just Choose India Over China The Trade Numbers Tell A Story - eattbm3


其实did的名字就已经包含了这个方法的核心原理了,difference-in-difference双重差分。 但很多人并没有理解到到底是哪两 … 随着 did 方法的拓展,许多实证研究将其拓展为多期 did,即实验组并非在同一时点遭受政策冲击。 但是,自 2019 年来,不少学者 …