I am looking at the impact of covid on labor demand. All the regions in my sample receive the treatment (covid) at the same time. There is no control group.

However, when I run did2s, where the treatment variable is the timing of covid, STATA runs and gives me results (amazing results in fact). In this case, what is the did2s command estimating? what model? As did2s is for staggered treatment and with both treatment groups and control groups. Can I trust the results? If not, what model should I be estimating?