How to keep all the treated observations?

[zoezoezhouwei]

Since some other matching packages usually provide an option which allows users to keep all the treated samples, especially when the size of the treated group is very small, I want to ask if there is an option for the PanelMatch package? If there is, do you know how to conduct it? Thank you :)

[zoezoezhouwei]

Hi, I explored the original example that your team gave. I found similar problem. In the original data, you have 3777 treated cases among 8733 observations. However, in the matched set, there are only 105 treated cases including those have no matched set. My question is where the remaining are? How were they dealt with?