Did Vs Have Done

Did Vs Have Done - .

Did Vs Have Done

DID Difference in Difference Difference 双重差分法作为一种计量模型，其本身不解决内生性问题，双重差分法解决内生性问题，本质上仍然依赖于干预或政策冲击本身的外生性。双重差分的形式标准 DID（standard DID）双重差 …

Did Vs Have Done多重人格、DID系统在现实中真的极少吗？国内对多重人格的定义仍很模糊，如果仅仅指被确诊的DID/多重人格障碍，那肯定不多——全国只有少量医院有专门处理这类疾病的精神科心理科， … DID IV 1