Hi all,

I currently have a panel data set for home-sharing listings from 2014-2021 for each month (84 total observations per property listing) in the Seattle area. I am looking at the effect of a tax on home-sharing that took effect in January of 2018. The tax affected each observation in my data set at the exact same time, so I am struggling right now on how to run the correct regression using only the pre-tax observations as a control group. Is it possible to use the data to look at the effect of the tax in this way, and if so, what STATA commands do you recommend I use?