Dear Statalist users,

I am a new member and I am really glad for being here!

I have a monthly panel dataset where my id consists of 28 countries and time spans from 2007m5 to 2017m2

xtset new_country date, monthly
panel variable: new_country (unbalanced)
time variable: date, 2007m5 to 2017m2
delta: 1 month
What I would like to do is to expand this panel dataset up to 2020m6. Then, in this newly added period, I would like to include new data that would be generated with linear interpolation. Any ideas, please?