Hello everyone, I have data set A that contains the following obs. The whole data set contain variables from 2013 to 2018. I need to create a new data set B that is the opposite data set of A. For company 0, I need to find the years that didn't send earnings announcements (year 2013, 2017). For company 1, the obs in data set B is year 2013, 2014, 2018. How could I use SAS to find the opposite data set? I very appreciate your help. company ID earnings'annoucement announcement date 0 2.4 4/10/2014 0 3.7 5/2/2015 0 4.3 3/8/2016 0 -1.0 2/5/2018 1 9.2 3/5/2015 1 8.3 6/2/2016 1 7.3 7/4/2017 2 4.2 3/6/2014 2 3.7 2/14/2018
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