My data is a panel of industry-years. Some industry-years have a value of 1 for an indicator variable "PERSISTENT." (Otherwise, PERSISTENT is missing.) Some industries do not have any years for which PERSISTENT is 1, and the years in which PERSISTENT takes on a value of 1 may vary by industry.
How can I recode PERSISTENT such that it takes on values of 0 before the industry-year observation that currently has a 1 AND takes on values of 1 for all industry-years afterward?
data want;
by industry;
retain flag;
if first.industry then flag=0;
if persistent=1 then flag=1;
run;
Show what your data looks like, is it long or wide?
Industry | Year | PERSISTENT |
11 | 1992 | |
11 | 1993 | |
11 | 1994 | |
11 | 1995 | 1 |
11 | 1996 | |
11 | 1997 | |
11 | 1998 | |
11 | 1999 | |
11 | 2000 | |
11 | 2001 | |
11 | 2002 | |
11 | 2003 | |
11 | 2004 | |
11 | 2005 | |
11 | 2006 |
That's an example of what the data looks like. I guess that's long?
data want;
by industry;
retain flag;
if first.industry then flag=0;
if persistent=1 then flag=1;
run;
Thank you so much. I was vastly overthinking it (thought I needed to do an array).
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
Find more tutorials on the SAS Users YouTube channel.