Hi, I am struggling to manage my large panel dataset 300k observation over 36 months. I would be grateful if anyone helps me in the following issue of my big panel data management.
  • in my panel data, I have some observation who have data from January 2017 to December 2019, as well as some observations who has data from June 2017 to December 2019. Here the issue is: the observations who have data from June 2017, does not have row/information from January 2017 to May 2017.
  • My question is: I want to keep only those observations who have data from January 2017 to December 2019, NOT from June 2017 to December 2019
I would be grateful if anyone helps me, how I can drop the samples who have data from June 2017 to December 2019 or keep only those samples who has data only from January 2017 to December 2019.

Best regards,
Deba