Hello,

I'm manipulating panel data and have a question regarding some variables. I have firms as the unit of analysis and each of them are given an ID. While information on their "entry of year" variable should be the same with the ID, some errors exist - e.g. some of the entry year is 1992 and others 1993 for the same firm - which I believe is a typo. I hope to align them all and make the information consistent within the ID. What command do I need to use? Or at least can I tag them to check?

Thank you for your help in advance!