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每年3月5日被定为“DID意识日”（DID Awareness Day），参与者会佩戴由多种颜色组成的意识丝带，其灵感源于“疯被子”（crazy quilt）这一比喻。 双重差分 (Differences-in-Differences,DID)，其常用于政策评估效应研究，比如研究‘鼓励上市政策’、‘开通沪港通’、‘开通高铁’、‘引入新教育模式’等效应时，分析效应带来的影响情况。 Even in 2023 and 2024 we continue to see improvements to existing packages and new releases
More applications are also coming out
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